Community Health Systems (CYH) 10-K 2012 FY Annual report

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in Registration Statement No. 333-181630 on Form S-3 and Registration Nos. 333-44870, 333-61614, 333-100349, 333-107810, 333-121282, 333-121283, 333-144525, 333-163688, 333-163689, 333-163690, 333-163691 and 333-176893 on Form S-8 of our reports dated February 27, 2013, relating to the consolidated financial statements and consolidated financial statement schedule of Community Health Systems, Inc. and subsidiaries, and the effectiveness of Community Health Systems, Inc. and subsidiaries’ internal control over financial reporting, appearing in this Annual Report on Form 10-K of Community Health Systems, Inc. and subsidiaries for the year ended December 31, 2012.

/s/ Deloitte & Touche LLP

Nashville, Tennessee

February 27, 2013