NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(unaudited)

NOTE 1 – NATURE OF BUSINESS AND BASIS OF PRESENTATION

We are a national provider of freestanding, fixed-site outpatient diagnostic imaging services in the United States based on number of locations and annual imaging revenue. At March 31, 2019 , we operated directly or indirectly through joint ventures with hospitals, 335 centers located in California, Delaware, Florida, Maryland, New Jersey, and New York. Our centers provide physicians with imaging capabilities to facilitate the diagnosis and treatment of diseases and disorders. Our services include magnetic resonance imaging (MRI), computed tomography (CT), positron emission tomography (PET), nuclear medicine, mammography, ultrasound, diagnostic radiology (X-ray), fluoroscopy and other related procedures. The vast majority of our centers offer multi-modality imaging services. Our multi-modality strategy diversifies revenue streams, reduces exposure to reimbursement changes and provides patients and referring physicians one location to serve the needs of multiple procedures.

The consolidated financial statements include the accounts of Radnet Management, Inc. (or “Radnet Management”) and Beverly Radiology Medical Group III, a professional partnership (“BRMG”). BRMG is a partnership of ProNet Imaging Medical Group, Inc., Beverly Radiology Medical Group, Inc. and Breastlink Medical Group, Inc. (formerly known as Westchester Medical Group Inc.). The consolidated financial statements also include Radnet Management I, Inc., Radnet Management II, Inc., Radiologix, Inc., Radnet Managed Imaging Services, Inc., Delaware Imaging Partners, Inc., New Jersey Imaging Partners, Inc. and Diagnostic Imaging Services, Inc., all wholly owned subsidiaries of Radnet Management. All of these affiliated entities are referred to collectively as “RadNet”, “we”, “us”, “our” or the “Company” in this report.

The Financial Accounting Standards Board (FASB) Accounting Standards Codification (“ASC”) 810-10-15-14, Consolidation, stipulates that generally any entity with a) insufficient equity to finance its activities without additional subordinated financial support provided by any parties, or b) equity holders that, as a group, lack the characteristics specified in the ASC which evidence a controlling financial interest, is considered a Variable Interest Entity (“VIE”). We consolidate all VIEs in which we are the primary beneficiary. We determine whether we are the primary beneficiary of a VIE through a qualitative analysis that identifies which variable interest holder has the controlling financial interest in the VIE. The variable interest holder who has both of the following has the controlling financial interest and is the primary beneficiary: (1) the power to direct the activities of the VIE that most significantly impact the VIE’s economic performance and (2) the obligation to absorb losses of, or the right to receive benefits from, the VIE that could potentially be significant to the VIE. In performing our analysis, we consider all relevant facts and circumstances, including: the design and activities of the VIE, the terms of the contracts the VIE has entered into, the nature of the VIE’s variable interests issued and how they were negotiated with or marketed to potential investors, and which parties participated significantly in the design or redesign of the entity.

Howard G. Berger, M.D., is our President and Chief Executive Officer, a member of our Board of Directors, and also owns, indirectly, 99% of the equity interests in BRMG. BRMG is responsible for all of the professional medical services at nearly all of our facilities located in California under a management agreement with us, and employs physicians or contracts with various other independent physicians and physician groups to provide the professional medical services at most of our California facilities. We generally obtain professional medical services from BRMG in California, rather than provide such services directly or through subsidiaries, in order to comply with California’s prohibition against the corporate practice of medicine. However, as a result of our close relationship with Dr. Berger and BRMG, we believe that we are able to better ensure that medical service is provided at our California facilities in a manner consistent with our needs and expectations and those of our referring physicians, patients and payors than if we obtained these services from unaffiliated physician groups.

As of February 28, 2019, we contract with seven medical groups which provide professional medical services at all of our facilities in Manhattan and Brooklyn, New York (“the NY Groups”). These contracts are similar to our contract with BRMG. Five of the NY Groups are owned or controlled by John V. Crues, III, M.D., RadNet’s Medical Director, a member of our Board of Directors, and a 1% owner of BRMG. Dr Berger owns a controlling interest in two of the NY Groups which provide professional medical services at one of our Manhattan facilities. On February 28, 2019, one of our NY Group entities, Lenox Hill Radiology and Medical Imaging Associates, P.C. ("LHR"), purchased the membership interest of Hudson Valley Radiology Associates, P.L.L.C. ("HVRA") for $6.0 million of RadNet common stock and contingent consideration valued at $680,000 to guarantee the share value issued for a period of six months post acquisition date. LHR has performed a preliminary purchase price allocation and recorded equipment of $10,000 , a covenant not to compete of $700,000 , trade name of $70,000 and goodwill of $3.1 million from the transaction. In connection with the acquisition, RadNet also settled against the purchase consideration, $2.8 million , net of taxes, of an unfavorable vendor contract with HVRA stemming from the previous acquisition of Radiologix, Inc. in November 2006.

RadNet provides non-medical, technical and administrative services to BRMG and the NY Groups for which it receives a management fee, pursuant to the related management agreements. Through the management agreements we have exclusive authority over all non-medical decision making related to the ongoing business operations of BRMG and the NY Groups and we determine the annual budget of BRMG and the NY Groups. BRMG and the NY Groups both have insignificant operating assets and liabilities, and de minimis equity. Through management agreements with us, substantially all cash flows of BRMG and the NY Groups after expenses including professional salaries are transferred to us.

We have determined that BRMG and the NY Groups are VIEs, that we are the primary beneficiary, and consequently, we consolidate the revenue and expenses, assets and liabilities of each. BRMG and the NY Groups on a combined basis recognized $37.4 million and $34.0 million of revenue, net of management service fees to RadNet, for the three months ended March 31, 2019 and 2018 , respectively, and $37.4 million and $34.0 million of operating expenses for the three months ended March 31, 2019 and 2018 , respectively. RadNet recognized in its condensed consolidated statement of operations $142.3 million and $118.6 million of net revenues for the three months ended March 31, 2019 , and 2018 respectively, for management services provided to BRMG and the NY Groups relating primarily to the technical portion of total billed revenue.

The cash flows of BRMG and the NY Groups are included in the accompanying consolidated statements of cash flows. All intercompany balances and transactions have been eliminated in consolidation. In our consolidated balance sheets at March 31, 2019 and December 31, 2018 , we have included approximately $98.7 million and $88.9 million , respectively, of accounts receivable and approximately $6.3 million and $5.6 million , respectively, of accounts payable and accrued liabilities related to BRMG and the NY Groups. Also in our consolidated balance sheets at March 31, 2019 we have included $2.7 million in intangible assets related to the purchase of membership interest of a New York Group VIE.

The creditors of BRMG and the NY Groups do not have recourse to our general credit and there are no other arrangements that could expose us to losses on behalf of BRMG and the NY Groups. However, RadNet may be required to provide financial support to cover any operating expenses in excess of operating revenues.

We also own a 49% economic interest in ScriptSender, LLC, which provides secure data transmission services of medical information. Through a management agreement, RadNet provides management and accounting services and receives an agreed upon fee. ScriptSender LLC is dependent on the Company to finance its own activities, and as such we determined that it is a VIE but we are not a primary beneficiary since we do not have the power to direct the activities of the entity that most significantly impact the entity’s economic performance.

At all of our centers we have entered into long-term contracts with radiology groups in the area to provide physician services at those facilities. These radiology practices provide professional services, including supervision and interpretation of diagnostic imaging procedures, in our diagnostic imaging centers. The radiology practices maintain full control over the provision of professional services. In these facilities we enter into long-term agreements with radiology practice groups (typically 40 years). Under these arrangements, in addition to obtaining technical fees for the use of our diagnostic imaging equipment and the provision of technical services, we provide management services and receive a fee based on the value of the services we provide. Except in New York City, the fee is based on the practice group’s professional revenue, including revenue derived outside of our diagnostic imaging centers. In New York City we are paid a fixed fee set in advance for our services.  We own the diagnostic imaging equipment and, therefore, receive 100% of the technical reimbursements associated with imaging procedures. The radiology practice groups retain the professional reimbursements associated with imaging procedures after deducting management service fees paid to us and we have no financial controlling interest in the radiology practices.

The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with the instructions to Form 10-Q and Rule 10-01 of Regulation S-X and, therefore, do not include all information and footnotes necessary for conformity with U.S. generally accepted accounting principles for complete financial statements; however, in the opinion of our management, all adjustments consisting of normal recurring adjustments necessary for a fair presentation of the financial position, results of operations and cash flows for the interim periods ended March 31, 2019 and 2018 have been made. The results of operations for any interim period are not necessarily indicative of the results for a full year. These interim condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and related notes thereto contained in our annual report on Form 10-K for the year ended December 31, 2018 .

NOTE 2 - SIGNIFICANT ACCOUNTING POLICIES

During the period covered in this report, we adopted a new significant accounting policy on Leases as described in Note 5 below. Except for the policy on Leases, there have been no material changes to the significant accounting policies we use and have explained, in our annual report on Form 10-K for the fiscal year ended December 31, 2018 . The information below is intended only to supplement the disclosure in our annual report on Form 10-K for the fiscal year ended December 31, 2018 .

REVENUES - Our revenues generally relate to net patient fees received from various payers and patients themselves under contracts in which our performance obligations are to provide diagnostic services to the patients. Revenues are recorded during the period our obligations to provide diagnostic services are satisfied. Our performance obligations for diagnostic services are generally satisfied over a period of less than one day. The contractual relationships with patients, in most cases, also involve a third-party payer (Medicare, Medicaid, managed care health plans and commercial insurance companies, including plans offered through the health insurance exchanges) and the transaction prices for the services provided are dependent upon the terms provided by (Medicare and Medicaid) or negotiated with (managed care health plans and commercial insurance companies) the third-party payers. The payment arrangements with third-party payers for the services we provide to the related patients typically specify payments at amounts less than our standard charges and generally provide for payments based upon predetermined rates per diagnostic services or discounted fee-for-service rates. Management continually reviews the contractual estimation process to consider and incorporate updates to laws and regulations and the frequent changes in managed care contractual terms resulting from contract renegotiations and renewals.

As it relates to BRMG centers, this service fee revenue includes payments for both the professional medical interpretation revenue recognized by BRMG as well as the payment for all other aspects related to our providing the imaging services, for which we earn management fees from BRMG. As it relates to non-BRMG centers, this service fee revenue is earned through providing the use of our diagnostic imaging equipment and the provision of technical services as well as providing administration services such as clerical and administrative personnel, bookkeeping and accounting services, billing and collection, provision of medical and office supplies, secretarial, reception and transcription services, maintenance of medical records, and advertising, marketing and promotional activities.

Our revenues are based upon the estimated amounts we expect to be entitled to receive from patients and third-party payers. Estimates of contractual allowances under managed care and commercial insurance plans are based upon the payment terms specified in the related contractual agreements. Revenues related to uninsured patients and uninsured copayment and deductible amounts for patients who have health care coverage may have discounts applied (uninsured discounts and contractual discounts). We also record estimated implicit price concessions (based primarily on historical collection experience) related to uninsured accounts to record self-pay revenues at the estimated amounts we expect to collect.

Under capitation arrangements with various health plans, we earn a per-enrollee amount each month for making available diagnostic imaging services to all plan enrollees under the capitation arrangement. Revenue under capitation arrangements is recognized in the period in which we are obligated to provide services to plan enrollees under contracts with various health plans.

The Company’s total net revenues during the three months ended March 31, 2019 and 2018 are presented in the table below based on an allocation of the estimated transaction price with the patient between the primary patient classification of insurance coverage (in thousands):

RECLASSIFICATION – We have reclassified certain amounts within our table of income allocation for 2018 to conform to our 2019 presentation.

ACCOUNTS RECEIVABLE - Substantially all of our accounts receivable are due under fee-for-service contracts from third party payors, such as insurance companies and government-sponsored healthcare programs, or directly from patients. Services are generally provided pursuant to one-year contracts with healthcare providers. We continuously monitor collections from our

payors and maintain an allowance for bad debts based upon specific payor collection issues that we have identified and our historical experience.

In 2018 we entered into factoring agreements with various institutions and sold certain accounts receivable under non-recourse agreements. These transactions are accounted for as a reduction in accounts receivable as the agreements transfer effective control over and risk related to the receivables to the buyers. The aggregate gross amount factored under these facilities was  $20.5 million  for the year ended December 31, 2018 and the cost of factoring such accounts receivable for the year ended December 31, 2018 was  $440,000 . Proceeds will be received as a combination of cash and payments on notes receivable and will be reflected as operating activities on our statement of cash flows and on our balance sheet as prepaid expenses and other current assets for the current portion and deposits and other for the long term portion. At March 31, 2019 we have  $17.8 million  remaining to be collected on these agreements. We do not utilize factoring arrangements as an integral part of our financing for working capital.

DEFERRED FINANCING COSTS - Costs of financing are deferred and amortized using the effective interest rate method. Deferred financing costs, net of accumulated amortization, were $1.2 million and $1.4 million , as of March 31, 2019 and December 31, 2018 , respectively and related to our line of credit. See Note 6, Revolving Credit Facility and Notes Payable, for more information.

INVENTORIES - Inventories, consisting mainly of medical supplies, are stated at the lower of cost or net realizable value with cost determined by the first-in, first-out method.

PROPERTY AND EQUIPMENT - Property and equipment are stated at cost, less accumulated depreciation and amortization. Depreciation of property and equipment is performed using the straight-line method over the estimated useful lives of the assets acquired, which range from 3 to 15 years. Leasehold improvements are amortized at the lesser of lease term or their estimated useful lives, which range from 3 to 15 years. Maintenance and repairs are charged to expense as incurred.

BUSINESS COMBINATION - When the qualifications for business combination accounting treatment are met, it requires us to recognize separately from goodwill the assets acquired and the liabilities assumed at their acquisition date fair values. Goodwill as of the acquisition date is measured as the excess of consideration transferred over the net of the acquisition date fair values of the assets acquired and the liabilities assumed. While we use our best estimates and assumptions to accurately value assets acquired and liabilities assumed at the acquisition date, our estimates are inherently uncertain and subject to refinement. As a result, during the measurement period, which may be up to one year from the acquisition date, we record adjustments to the assets acquired and liabilities assumed with the corresponding offset to goodwill. Upon the conclusion of the measurement period or final determination of the values of assets acquired or liabilities assumed, whichever comes first, any subsequent adjustments are recorded to our consolidated statements of operations.

GOODWILL AND INDEFINITE LIVED INTANGIBLES- Goodwill at March 31, 2019 totaled $424.3 million . Indefinite lived intangible assets at March 31, 2019 were $9.9 million . Goodwill and Indefinite Lived Intangibles are recorded as a result of business combinations. When we determine the carrying value of goodwill exceeds its fair value an impairment charge would be recognized and should not exceed the total amount of goodwill allocated to that reporting unit. We tested goodwill and indefinite lived intangibles for impairment on October 1, 2018. During the review we noted our Teleradiology unit, Imaging On Call, (IOC), experienced a reduction of professional medical group clients and a contract with a major local health provider during 2018. This affected its estimated fair value and resulted in impairment charges to our the reporting unit of $3.9 million for the twelve months ended December 31, 2018 , with goodwill representing $3.8 million of the total and the remainder being its trade name of approximately $100,000 . We have not identified any indicators of impairment through March 31, 2019 . Activity in goodwill for the three months ended March 31, 2019 is provided below (in thousands):

INCOME TAXES - Income tax expense is computed using an asset and liability method and using expected annual effective tax rates. Under this method, deferred income tax assets and liabilities result from temporary differences in the financial reporting bases and the income tax reporting bases of assets and liabilities. The measurement of deferred tax assets is reduced, if necessary, by the amount of any tax benefit that, based on available evidence, is not expected to be realized. When it appears more

likely than not that deferred taxes will not be realized, a valuation allowance is recorded to reduce the deferred tax asset to its estimated realizable value. For net deferred tax assets we consider estimates of future taxable income in determining whether our net deferred tax assets are more likely than not to be realized. We recorded an income tax benefit of $1.2 million , or an effective tax rate of 39.0% , for the three months ended March 31, 2019 compared to income tax benefit for the three months ended March 31, 2018 of $2.5 million , or an effective tax rate of 22.4% . The income tax rates for the three months ended March 31, 2019 diverge from the federal statutory rate due to (i) noncontrolling interests due to the controlled partnerships; (ii) effects of state income taxes; (iii) excess tax benefits attributable to share-based compensation; and adjustment associated with uncertain tax positions.

U.S. GAAP requires that the impact of tax legislation be recognized in the period in which the law was enacted. As a result, we recorded provisional amounts due to the revaluation of deferred tax assets and liabilities and the transition tax on deemed repatriation of accumulated foreign income during the year ended December 31, 2018 . Both of these tax charges represent provisional amounts and our current best estimates. Any adjustments recorded to the provisional amounts will be included as an adjustment to tax expense. The provisional amounts incorporate assumptions made based upon our current interpretation of the Tax Reform Act and may change as we receive additional clarification and implementation guidance.

We are not under examination in any jurisdiction and the years ended December 31, 2018 , 2017 , and 2016 remain subject to examination. We believe no significant changes in the unrecognized tax benefits will occur within the next 12 months.

LEASES - We determine if an arrangement is a lease at inception. Operating leases are included in operating lease right-of-use (“ROU”) assets, current operating lease liabilities, and long term operating lease liability in our consolidated balance sheets. Finance leases are included in property and equipment, current finance lease liability, and long-term finance lease liability in our consolidated balance sheets.  ROU assets represent our right to use an underlying asset for the lease term and lease liabilities represent our obligation to make lease payments arising from the lease. Operating lease ROU assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. As most of our leases do not provide an implicit rate, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. We use the implicit rate when readily determinable. We include options to extend a lease when it is reasonably certain that we will exercise that option. Lease expense for lease payments is recognized on a straight-line basis over the lease term. For a contract in which we are a lessee that contains fixed payments for both lease and non-lease components, we have elected to account for the components as a single lease component, as permitted. For finance leases, interest expense on the lease liability is recognized using the effective interest method and amortization of the right-of-use asset is recognized on a straight-line basis over the shorter of the estimated useful life of the asset or the lease term. See Note 5, Leases, for more information.

EQUITY BASED COMPENSATION – We have one long-term incentive plan that we adopted in 2006 and which we first amended and restated as of April 20, 2015, and again on March 9, 2017 (the “Restated Plan”). The Restated Plan was approved by our stockholders at our annual stockholders meeting on June 8, 2017. We have reserved for issuance under the Restated Plan 14,000,000 shares of common stock. We can issue options, stock awards, stock appreciation rights, stock units and cash awards under the Restated Plan. Certain options granted under the Restated Plan to employees are intended to qualify as incentive stock options under existing tax regulations. Stock options and warrants generally vest over three to five years and expire five to ten years from date of grant. The compensation expense recognized for all equity-based awards is recognized over the awards’ service periods. Equity-based compensation is classified in operating expenses within the same line item as the majority of the cash compensation paid to employees. See Note 7, Stock-Based Compensation, for more information.

COMPREHENSIVE INCOME - ASC 220, Comprehensive Income, establishes rules for reporting and displaying comprehensive income or loss and its components. Our unrealized gains or losses on foreign currency translation adjustments and our interest rate cap agreement are included in comprehensive income. The components of comprehensive loss for the three months ended March 31, 2019 are included in the consolidated statements of comprehensive loss.

DERIVATIVE INSTRUMENTS - In the fourth quarter of 2016, we entered into two forward interest rate cap agreements ("2016 Caps"). The 2016 Caps will mature in September and October 2020. The 2016 Caps had notional amounts of $150,000,000 and $350,000,000 , respectively, which were designated at inception as cash flow hedges of future cash interest payments associated with portions of the our variable rate bank debt. Under these arrangements, the Company purchased a cap on 3 month LIBOR at 2.0% . We are liable for a $5.3 million premium to enter into the caps which is being accrued over the life of the agreements.

At inception, we designated our 2016 Caps as cash flow hedges of floating-rate borrowings. In accordance with ASC Topic 815, derivatives that have been designated and qualify as cash flow hedging instruments are reported at fair value. The gain or loss of the hedge (i.e. change in fair value) is reported as a component of comprehensive loss in the consolidated statement of equity.  See Fair Value Measurements section below for the fair value of the 2016 Caps at March 31, 2019 .

A tabular presentation of the effect of derivative instruments on our consolidated statement of comprehensive loss is as follows (amounts in thousands):

FAIR VALUE MEASUREMENTS – Assets and liabilities subject to fair value measurements are required to be disclosed within a fair value hierarchy. The fair value hierarchy ranks the quality and reliability of inputs used to determine fair value. Accordingly, assets and liabilities carried at, or permitted to be carried at, fair value are classified within the fair value hierarchy in one of the following categories based on the lowest level input that is significant to a fair value measurement:

Level 1—Fair value is determined by using unadjusted quoted prices that are available in active markets for identical assets and liabilities.

Level 2—Fair value is determined by using inputs other than Level 1 quoted prices that are directly or indirectly observable. Inputs can include quoted prices for similar assets and liabilities in active markets or quoted prices for identical assets and liabilities in inactive markets. Related inputs can also include those used in valuation or other pricing models such as interest rates and yield curves that can be corroborated by observable market data.

Level 3—Fair value is determined by using inputs that are unobservable and not corroborated by market data. Use of these inputs involves significant and subjective judgment.

The table below summarizes the estimated fair values of certain of our financial assets that are subject to fair value measurements, and the classification of these assets on our consolidated balance sheets, as follows (in thousands):

The estimated fair value of these contracts was determined using Level 2 inputs. More specifically, the fair value was determined by calculating the value of the difference between the fixed interest rate of the interest rate swaps and the counterparty’s forward LIBOR curve. The forward LIBOR curve is readily available in the public markets or can be derived from information available in the public markets.

The table below summarizes the estimated fair value compared to our face value of our long-term debt as follows (in thousands):

As of March 31, 2019 and December 31, 2018 , our Barclays revolving credit facility had $41.0 million and $28.0 million aggregate principal amount outstanding, respectively. Our SunTrust revolving credit facility had no principal amount outstanding at March 31, 2019.

The estimated fair value of our long-term debt, which is discussed in Note 6, was determined using Level 2 inputs primarily related to comparable market prices.

We consider the carrying amounts of cash and cash equivalents, receivables, other current assets, current liabilities and other notes payables to approximate their fair value because of the relatively short period of time between the origination of these instruments and their expected realization or payment. Additionally, we consider the carrying amount of our capital lease obligations to approximate their fair value because the weighted average interest rate used to formulate the carrying amounts approximates current market rates.

EARNINGS PER SHARE - Earnings per share is based upon the weighted average number of shares of common stock and common stock equivalents outstanding, net of common stock held in treasury, as follows (in thousands except share and per share data):

    

For the three months ended March 31, 2019 and 2018 we excluded all outstanding options and restricted stock awards in the calculation of diluted earnings per share because their effect would be antidilutive.

EQUITY INVESTMENTS AT FAIR VALUE–Accounting guidance requires entities to measure equity investments at fair value, with any changes in fair value recognized in net income. If there is no readily determinable fair value, the guidance allows entities the ability to measure investments at cost less impairment.

As of March 31, 2019 , we have two equity investments for which a fair value is not readily determinable and therefore the total amounts invested are recognized at cost as follows:

Medic Vision:

Medic Vision, based in Israel, specializes in software packages that provide compliant radiation dose structured reporting and enhanced images from reduced dose CT scans.

On March 24, 2017, we acquired an initial 12.5% equity interest in Medic Vision – Imaging Solutions Ltd for $1.0 million . We also received an option to exercise warrants to acquire up to an additional 12.5% equity interest for $1.4 million within one year from the initial share purchase date, if exercised in full. On March 1, 2018 we exercised our warrant in part and acquired an additional 1.96% for $200,000 . Our initial equity interest has been diluted to 12.25% and our total equity investment stands at 14.21% .

In accordance with accounting guidance , as we exercise no significant influence over Medic Vision’s operations, the investment is recorded at its cost of $1.2 million , given that the fair value is not readily determinable. No impairment in our investment was identified as of the three months ended March 31, 2019 .

Turner Imaging:

Turner Imaging Systems, based in Utah, develops and markets portable X-ray imaging systems that provide a user the ability to acquire X-ray images wherever and whenever they are needed. On February 1, 2018, we purchased 2.1 million preferred shares in Turner Imaging Systems for $2.0 million . On January 1, 2019 we funded a convertible promissory note in the amount of $143,000 that will convert to additional preferred shares no later than December 21, 2019. No impairment in our investment was identified for the three months ended March 31, 2019 .

INVESTMENT IN JOINT VENTURES – We have 14 unconsolidated joint ventures with ownership interests ranging from 25% to 55% . These joint ventures represent partnerships with hospitals, health systems or radiology practices and were formed for the purpose of owning and operating diagnostic imaging centers. Professional services at the joint venture diagnostic imaging centers are performed by contracted radiology practices or a radiology practice that participates in the joint venture. Our investment in these joint ventures is accounted for under the equity method, since RadNet does not have a controlling financial interest in such ventures. We evaluate our investment in joint ventures, including cost in excess of book value (equity method goodwill) for impairment whenever indicators of impairment exist. No indicators of impairment existed as of March 31, 2019 .

Sale of joint venture interest:

On April 1, 2017, we formed in conjuncture with Cedars Sinai Medical Center (“CSMC”) the Santa Monica Imaging Group, LLC (“SMIG”), consisting of two multi-modality imaging centers located in Santa Monica, CA with RadNet holding a 40% economic interest and CSMC holding a 60% economic interest. RadNet accounts for our share of the venture under the equity method. On January 1, 2019, CSMC purchased from the company, an additional five percent economic interest in SMIG valued at $134,000 . As a result of the transaction, our economic interest in SMIG has been reduced to 35% . We recorded a loss of $2,000 on the transaction.

Joint venture investment and financial information

The following table is a summary of our investment in joint ventures during the three months ended March 31, 2019 (in thousands):

We charged management service fees from the centers underlying these joint ventures of approximately $2.1 million and $3.4 million for the quarters ended March 31, 2019 and 2018 , respectively. We eliminate any unrealized portion of our management service fees with our equity in earnings of joint ventures.

The following table is a summary of key balance sheet data for these joint ventures as of March 31, 2019 and December 31, 2018 and income statement data for the three months ended March 31, 2019 and 2018 (in thousands):