River Oaks Hospital S-4 Registration of securities issued in business combination transactions

Exhibit 3.70

State of Delaware

Secretary of State

Division of Corporations

Delivered 06:55 PM 12/16/2008

FILED 06:35 PM 12/16/2008

SRV 081202458 – 4634571 FILE

CERTIFICATE OF FORMATION

OF

CENTRAL FLORIDA HMA HOLDINGS, LLC

1. The name of the limited liability company is Central Florida HMA Holdings, LLC.

2. The address of its registered office in the State of Delaware is: Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, Delaware 19801. The name of its registered agent at such address is The Corporation Trust Company.

IN WITNESS WHEREOF, the undersigned have executed this Certificate of Formation of Central Florida HMA Holdings, LLC this 15^th day of December, 2008.

/s/ Timothy R. Parry

Timothy R. Parry, Organizer

Health Management Associates, Inc.

5811 Pelican Bay Boulevard, Suite 500

Naples, Florida 34108