Item 4.01. Changes in Registrant’s Certifying Accountant.

(a) Dismissal of Independent Registered Accounting Firm.

As previously disclosed, on June 26, 2013, the Audit Committee of the Board of Directors of Inergy GP, LLC (“NRGY GP”), the general partner of Inergy, dismissed Deloitte & Touche LLP (“Deloitte”) as the independent registered public accounting firm of Crestwood Gas Services GP LLC (“CMLP GP”). Inergy is the sole member of CMLP GP. The dismissal was to be effective as of the date of the completion by Deloitte of the audit of CMLP GP. Deloitte completed the audit of CMLP GP as of July 23, 2013 and accordingly the dismissal is now effective. CMLP GP is the accounting predecessor to Inergy and its financial statements now constitute the primary financial statements of Inergy.

The audit report on the financial statements of CMLP GP for the fiscal years ended December 31, 2012 and December 31, 2011 issued by Deloitte did not contain any adverse opinion or disclaimer of opinion, nor was the report qualified or modified as to uncertainty, audit scope or accounting principles. Furthermore, during CMLP GP’s two most recent fiscal years ended December 31, 2012 and December 31, 2011 and the subsequent interim period through July 23, 2013, (1) there were no disagreements between CMLP GP and Deloitte on any matter of accounting principles or practices, financial statement disclosure or auditing scope or procedure, which disagreements, if not resolved to the satisfaction of Deloitte, would have caused Deloitte to make reference thereto in its report on CMLP GP’s financial statements for such periods, and (2) there were no “reportable events” as that term is described in Item 304(a)(1)(v) of Regulation S-K.

CMLP GP has provided Deloitte with a copy of the foregoing disclosure prior to its filing with the Commission and requested that Deloitte furnish CMLP GP a letter addressed to the Commission stating whether or not it agrees with the statements above and, if not, stating the respects in which it does not agree. A copy of Deloitte’s letter to the Commission, dated July 23, 2013, is attached hereto as Exhibit 16.1.

(b) Engagement of New Independent Registered Accounting Firm.

As previously disclosed, on June 26, 2103, the Audit Committee of the Board of Directors of NRGY GP approved the engagement of Ernst & Young LLP (“E&Y”) as the principal accountant to audit Inergy’s financial statements as of and for the fiscal year ending December 31, 2013.

During CMLP GP’s fiscal years ended December 31, 2012 and 2011 and the subsequent interim period ending July 23, 2013, CMLP GP did not consult E&Y in regards to CMLP GP’s financial statements, which were audited by Deloitte as its independent accountant, with respect to (1) the application of accounting principles to a specified transaction, either completed or proposed and (2) the type of audit opinion that was rendered on CMLP GP’s financial statements or might be rendered on CMLP GP’s financial statements. During such fiscal years and subsequent interim period ending July 23, 2013, CMLP GP did not consult with E&Y in regards to CMLP GP’s financial statements with respect to any matter that was the subject of a “disagreement” or a “reportable event” as those terms are described in Item 304(a)(1) of Regulation S-K.