Exhibit 99.1

PRESS RELEASE

FOR IMMEDIATE RELEASE

HEALTH MANAGEMENT ASSOCIATES ANNOUNCES

THIRD QUARTER 2013 RESULTS

NAPLES, FLORIDA (November 13, 2013) Health Management Associates, Inc. (NYSE: HMA) (“HMA”) today announced its consolidated financial results for the third quarter ended September 30, 2013 and the completion of the previously announced restatements.

Key metrics from continuing operations for the third quarter (all percentage changes in the bullet points below compare the third quarter of 2013 to the third quarter of 2012) include:

The tables accompanying this press release include reconciliations of consolidated net income to all presentations of Adjusted EBITDA (which is not a GAAP measure) contained in this press release. Those tables also reconcile earnings per share on a GAAP basis to those amounts presented in this press release and contain disclaimers and other important information regarding how HMA defines and uses Adjusted EBITDA.

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During the third quarter, the Company incurred approximately $102.9 million of expenses related to change of control, severance and merger related costs. On August 16, 2013, the Company disclosed that shareholders holding a majority of the outstanding shares of the Company’s common stock voted to replace the incumbent board members with the current board members, triggering a change in control pursuant to HMA’s incentive compensation plans. As a result, all of the outstanding and unvested equity and performance cash awards, stock options and stock awards became vested. This vesting resulted in the recognition of approximately $85.1 million of incremental compensation expense. These expenses are not expected to recur. In addition, the Company has incurred approximately $17.7 million of costs associated with retention and severance agreements with key personnel and the engagement of various advisors related to the merger agreement with Community Health Systems, Inc. (NYSE:CYH) (“CHS”) previously announced on July 30, 2013 and the consent solicitation process to replace the board.

Compared to the same period a year ago, same hospital admissions and adjusted admissions for the third quarter ended September 30, 2013 decreased by 6.8% and 2.9%, respectively.

For the third quarter, HMA’s provision for doubtful accounts was $255.4 million, or 15.2% of net revenue before the provision for doubtful accounts, compared to $224.1 million, or 13.5% of net revenue before the provision of doubtful accounts, for the same quarter a year ago.

Uninsured self-pay patient discounts for the third quarter were $387.7 million, compared to $334.7 million for the same quarter a year ago. Charity/indigent care write-offs were $26.8 million for the third quarter, compared to $28.1 million for the same quarter a year ago.

The sum of uninsured discounts, charity/indigent write-offs and the provision for doubtful accounts, as a percent of the sum of net revenue before the provision for doubtful accounts, uninsured discounts and charity/indigent write-offs (which HMA refers to as its Uncompensated Patient Care Percentage) was 32.0% for the third quarter, compared to 29.0% for the third quarter a year ago, and 30.3% for the quarter ended June 30, 2013. Health Management believes that its Uncompensated Patient Care Percentage provides key information regarding the aggregate level of patient care for which it does not receive payment.

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Cash flow from continuing operating activities for the third quarter was ($7.3) million, after cash interest and cash tax payments aggregating $79.6 million. During the third quarter, as a result of a change in control of the Company’s board, the Company paid approximately $40 million in cash related to the vesting of certain cash awards under the Company’s incentive compensation programs and approximately $35 million in cash for the corresponding payroll taxes associated with the vesting of stock awards. In addition, cash flow from operations for the quarter was impacted by an increase of approximately $50 million in accounts receivable related to the previously announced joint venture with Bayfront Health Systems. Medicare and Medicaid tie-in notices for Bayfront were received late in the third quarter, and the Company expects to bill and collect these accounts receivable in the fourth quarter. As of September 30, 2013, HMA’s total leverage ratio was 4.8 and interest coverage ratio was 3.6 both ratios within its debt covenant requirements.

For the nine months ended September 30, 2013, HMA reported net revenue of $4.371 billion, Adjusted EBITDA of $522.1 million, and consolidated diluted EPS from continuing operations of $(0.28). Excluding the impact of approximately $57.7 million, or $0.14 per diluted share, for interest rate swap accounting as well as mark-to-market adjustments on the swap due to interest rate conditions, and $112.0 million, or $0.35 per diluted share, for change of control, severance and merger related costs, diluted earnings per share from continuing operations was $0.21 for the nine months ended September 30, 2013.

The Company has completed its previously announced restatement to correct the accounting treatment of approximately $31.0 million of Medicare and Medicaid HCIT incentive payments which were recognized as income by the Company between July 1, 2011 and June 30, 2013 for 11 hospitals that did not meet “meaningful use” criteria. Earlier today the Company filed amendments to its Annual Report on Form 10-K for the fiscal year ended December 31, 2012 and its Quarterly Reports on Form 10-Q for the fiscal quarters ended March 31, 2013 and June 30, 2013 containing restated financial statements. The restatements also reflect certain immaterial unrelated adjustments. The Company has corrected its accounting treatment and is in the process of implementing new controls to remediate a material weakness in internal control over financial reporting that existed at those dates and at September 30, 2013 related to the administration, oversight and accounting for the Company’s electronic health records enrollment process. As previously reported, the Company has repaid the majority of the $31.0 million, and is in the process of repaying the balance, to the governmental agencies responsible for the HCIT programs and expects to re-enroll the hospitals in the HCIT programs and may be able to recoup some portion of the amount repaid.

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As reflected in the tables accompanying this press release, the Company is updating its 2013 annual guidance. For the fiscal year ended December 31, 2013, the Company expects net revenue, before the provision for doubtful accounts, to be between $6.84 billion and $6.86 billion, Adjusted EBITDA to be between $790 million and $800 million, and diluted EPS to be between $0.48 and $0.50. This guidance reflects our third quarter results, and assumes continued admission softness and net revenue pressure for the balance of the year. In addition, these estimates include approximately $60 million to $65 million of expected HCIT incentive payments in the fourth quarter, and approximately $10 million to $15 million of anticipated fourth quarter negative impact related to Blue Cross/Blue Shield relations in Mississippi.

As previously announced, CHS and HMA have entered into a definitive merger agreement under which CHS will acquire each outstanding share of HMA common stock for $10.50 in cash, 0.06942 of a share of CHS common stock and a Contingent Value Right, which could yield additional cash consideration of up to $1.00 per share, depending on certain matters described in the Registration Statement on Form S-4 filed by CHS. On July 30, 2013, the cash and stock portion of the consideration was valued at $13.78 per HMA share and as of November 11, 2013, the consideration has a value of approximately $13.42, in each case, plus the Contingent Value Right. As previously disclosed, the parties expect to close the transaction during the first quarter of 2014. The merger is subject to satisfaction of customary closing conditions, including approval by HMA’s stockholders holding 70 percent of HMA’s outstanding shares, antitrust clearance, receipt of other regulatory approvals and the absence of certain adverse developments. HMA will host a listen-only conference call and webcast to discuss the contents of this press release and HMA’s consolidated financial results for the three and nine months ended September 30, 2013 later today, November 13, 2013 at 10:00 a.m. ET. Investors are invited to access the webcast via HMA’s website at www.HMA.com or via www.streetevents.com. Alternatively, investors may listen to the conference call by dialing US: (800) 585-8367 / International: (404) 537-3406, Conference ID: 99225973.

HMA will archive a copy of the audio webcast of the conference call, along with any related information that HMA may be required to provide pursuant to Securities and Exchange Commission rules, on its website under the heading “Investor Relations” for a period of 60 days following the conference call and webcast.

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About HMA

Health Management Associates, Inc., through its affiliates, owns and manages hospitals and ambulatory surgery centers in small cities and selected larger urban markets. HMA currently operates 71 hospitals in 15 states with approximately 11,000 licensed beds. Shares in Health Management Associates are traded on the New York Stock Exchange under the symbol “HMA.”

Important Information and Where to Find It

In connection with the proposed transaction, CHS has filed with the Securities and Exchange Commission (the “SEC”) a registration statement on Form S-4 that includes a preliminary proxy statement of HMA and a preliminary prospectus of CHS. CHS and HMA plan to file a definitive proxy statement/prospectus and other relevant documents with the SEC regarding the proposed transaction. INVESTORS AND SECURITY HOLDERS ARE URGED TO READ THE REGISTRATION STATEMENT AND DEFINITIVE PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION ABOUT CHS, HMA AND THE MERGER. When completed and available, the definitive proxy statement/prospectus and a form of proxy will be mailed to stockholders of HMA. These materials and other documents filed with the SEC will be available at no charge at the SEC’s website at www.sec.gov. In addition, stockholders will be able to obtain copies of the definitive proxy statement/prospectus (when they become available) and other documents filed with the SEC from CHS’s website at www.chs.net or and HMA’s website at www.hma.com or by directing such request to CHS at 4000 Meridian Boulevard, Franklin, Tennessee 37067, Attention: Investor Relations, or to HMA at 5811 Pelican Bay Boulevard, Naples, Florida 34108, Attention: Investor Relations.

CHS, HMA and certain of their respective directors, executive officers and other persons may be deemed to be participants in the solicitation of proxies in respect of the merger. Information regarding CHS’s directors and executive officers is available in CHS’s proxy statement filed with the SEC on April 5, 2013 in connection with its 2013 annual meeting of stockholders, and information regarding HMA’s directors and executive officers is available in HMA’s preliminary proxy statement contained in the registration statement on Form S-4 filed by CHS with SEC on September 24, 2013, as may be amended.

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This communication shall not constitute an offer to sell or the solicitation of an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. No offer of securities shall be made except by means of a prospectus meeting the requirements of Section 10 of the Securities Act of 1933, as amended.

Forward-Looking Statements

Certain statements contained in this communication may constitute “forward-looking statements” within the meaning of the Private Securities Litigation Reform Act of 1995. Forward-looking statements are subject to risks, uncertainties and assumptions and are identified by words such as “expects,” “estimates,” “projects,” “anticipates,” “believes,” “intends,” “plans,” “may,” “pending,” “continues,” “should,” “could” and other similar words. All statements addressing operating performance, events or developments that Health Management Associates, Inc. expects or anticipates will occur in the future, including but not limited to projections of revenue, provisions for doubtful accounts, income or loss, capital expenditures, debt structure, principal payments on debt, capital structure, the amount and timing of funds under the meaningful use measurement standard of various Healthcare Information Technology incentive programs, other financial items and operating statistics, statements regarding our plans and objectives for future operations, the impact of changes in observation stays, our ability to achieve process efficiencies, factors we believe may have an impact on our deductibles and co-pays, acquisitions, acquisition financing, divestitures, joint ventures, market service development and other transactions, statements of future economic performance, statements regarding our legal proceedings and other loss contingencies (including, but not limited to, the timing and estimated costs of such matters), statements regarding market risk exposures, statements regarding our ability to achieve cost efficiencies and/or reductions, statements regarding the effects and/or interpretations of recently enacted or future health care laws and regulations, statements regarding the potential impact of health care exchanges, remediation of the related material weakness in internal control over financial reporting, statements of the beliefs or assumptions underlying or relating to any of the foregoing statements, and statements that are other than statements of historical fact, are considered to be “forward-looking statements.” These statements also include, but are not limited to, statements regarding the expected timing of the completion of the merger with CHS, the benefits of the

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merger, including future financial and operating results, the combined company’s plans, objectives, expectations and other statements that are not historical facts. Such statements are based on the views and assumptions of the management of CHS and HMA and are subject to significant risks and uncertainties. Actual future events or results may differ materially from these statements. Such differences may result from the following factors: the ability to close the transaction on the proposed terms and within the anticipated time period, or at all, which is dependent on the parties’ ability to satisfy certain closing conditions, including the receipt of governmental approvals; the risk that the benefits of the transaction, including cost savings and other synergies may not be fully realized or may take longer to realize than expected; the impact of the transaction on third-party relationships; actions taken by either of the companies; changes in regulatory, social and political conditions, as well as general economic conditions. Additional risks and factors that may affect results are set forth in HMA’s and CHS’s filings with the Securities and Exchange Commission, including each company’s Annual Report on Form 10-K/A for the fiscal year ending December 31, 2012, as may be amended or supplemented.

The forward-looking statements speak only as of the date of this communication. Except as required by law, HMA does not undertake any obligation to update these statements.

(financial tables follow)

HEALTH MANAGEMENT ASSOCIATES, INC.

CONSOLIDATED STATEMENTS OF INCOME

(unaudited, in thousands, except per share amounts)

HEALTH MANAGEMENT ASSOCIATES, INC.

CONSOLIDATED STATEMENTS OF CASH FLOWS

(unaudited, in thousands)

HEALTH MANAGEMENT ASSOCIATES, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS AND STATISTICS

HEALTH MANAGEMENT ASSOCIATES, INC.

SUPPLEMENTAL CONSOLIDATED STATEMENTS OF INCOME INFORMATION

(unaudited, dollars in thousands)

HEALTH MANAGEMENT ASSOCIATES, INC.

SUPPLEMENTAL CONSOLIDATED STATEMENTS OF INCOME INFORMATION

(unaudited, in thousands, except per share amounts)

The following tables provide information regarding income from continuing operations attributable to HMA, excluding the impact of the interest rate swap amortization and mark-to-market adjustments and change in control and other related costs. This table is a non-GAAP presentation; nonetheless, HMA believes that providing this detail is beneficial to investors and other readers of HMA’s financial statements due to the significant impact these items had on income from continuing operations attributable to HMA.

Three Months Ended September 30, 2013

Three Months Ended September 30, 2012

(Restated)

HEALTH MANAGEMENT ASSOCIATES, INC.

SUPPLEMENTAL CONSOLIDATED STATEMENTS OF INCOME INFORMATION

(unaudited, in thousands, except per share amounts)

Nine Months Ended September 30, 2013

Nine Months Ended September 30, 2012

(Restated)

HEALTH MANAGEMENT ASSOCIATES, INC.

SUPPLEMENTAL CONSOLIDATED INFORMATION

The following table updates selected information concerning HMA’s previously announced objectives for the year ending December 31, 2013. These objectives are based on HMA’s historical operating performance, current trends and other assumptions that management believes are reasonable at this time. These objectives exclude any potential future hospital partnerships and acquisitions that may be completed during the rest of 2013.

Contact:

Health Management Associates, Inc.

Investor Contact:

John Merriwether, 239-598-3131

Vice President of Investor Relations