UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of

The Securities Exchange Act of 1934

Date of Report (date of earliest event reported): March 10, 2015 (March 9, 2015)

COMMUNITY HEALTH SYSTEMS, INC.

(Exact name of registrant as specified in its charter)

4000 Meridian Boulevard

Franklin, Tennessee 37067

(Address of principal executive offices)

Registrant’s telephone number, including area code: (615) 465-7000

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

On March 9, 2015, Community Health Systems, Inc. (the “Company”) and its wholly-owned subsidiary CHS/Community Health Systems, Inc. (the “Borrower”) entered into an Amendment No. 1 and Incremental Term Loan Assumption Agreement (the “Agreement”), among the Company, the Borrower, the subsidiary guarantors party thereto, the lenders party thereto and Credit Suisse AG, as administrative agent and collateral agent (the “Agent”).

The Agreement provides for a new $1,700,000,000 incremental term loan F facility (the “Incremental Term Loan Facility”) under the Credit Agreement, dated as of July 25, 2007, as amended and restated as of November 5, 2010, February 2, 2012 and January 27, 2014, among the Borrower, the Company, the lenders party thereto and the Agent (the “Credit Agreement”) and modifies certain “springing maturity” provisions applicable to the existing revolving credit facility and certain term loans. The proceeds of the Incremental Term Loan Facility are being used to repay the Company’s existing term loan E facility in full (which was scheduled to mature in January 2017) and to pay certain fees and expenses.

The Incremental Term Loan Facility has a maturity date of December 31, 2018, subject to customary acceleration events and to the repayment, extension or refinancing with longer maturity debt of certain of the Company’s other indebtedness. The pricing on the Incremental Term Loan Facility is LIBOR plus a margin of 325 basis points. The Incremental Term Loan Facility will amortize at 1% per annum (.25% quarterly).

The foregoing summary of the Agreement and the transactions contemplated thereby does not purport to be complete and is subject to, and qualified in its entirety by, the full text of the Agreement, which is attached hereto as Exhibit 10.1 and incorporated herein by reference.

The information set forth in Item 1.01 above is incorporated herein by reference.

On March 9, 2015, the Company announced that it had entered into the Agreement. A copy of the press release making this announcement is attached hereto as Exhibit 99.1 and incorporated herein by reference.

(d) Exhibits

The following items are included as Exhibits to this Form 8-K and incorporated herein by reference:

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this Report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit Index