Exhibit 3.331

PAGE 1

          I, JEFFREY W. BULLOCK, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED ARE TRUE AND CORRECT COPIES OF ALL DOCUMENTS ON FILE OF “RIVER PARISHES PHYSICIAN PRACTICES, LLC” AS RECEIVED AND FILED IN THIS OFFICE.

          THE FOLLOWING DOCUMENTS HAVE BEEN CERTIFIED:

          CERTIFICATE OF FORMATION, FILED THE NINTH DAY OF JUNE, A.D. 2004, AT 6:39 O’CLOCK P.M.

          AND I DO HEREBY FURTHER CERTIFY THAT THE AFORESAID CERTIFICATES ARE THE ONLY CERTIFICATES ON RECORD OF THE AFORESAID LIMITED LIABILITY COMPANY, “RIVER PARISHES PHYSICIAN PRACTICES, LLC”.

3814233 8100H
110292908 /s/ Jeffrey W. Bullock
  Jeffrey W. Bullock, Secretary of State
AUTHENTICATION: 8620283
DATE: 03-14-11

You may verify this certificate
online at corp. delaware. gov/authver. shtml

State of Delaware
Secretary of State
Division of Corporations
Delivered 08:07 PM 06/09/2004
FILED 06:39 PM 06/09/2004
SRV 040429014 – 3814233 FILE

Certificate of Formation
of
River Parishes Physician Practices, LLC

          The undersigned, an authorized natural person, for the purpose of forming a limited liability company, under the provisions and subject to the requirements of the State of Delaware, particularly Chapter 18, Title 6 of the Delaware Code and the acts amendatory thereof and supplemental thereto, and known, identified, and referred to as the Delaware Limited Liability Company Act (the “Act”), hereby certifies that:

          FIRST: The name of the limited liability company is River Parishes Physician Practices, LLC (the “Company”).

          SECOND: The address of the registered office and the name and address of the registered agent of the Company required to be maintained by Section 18-104 of the Act is The Corporation Trust Company, Corporation Trust Center, 1209 Orange Street, Wilmington, Delaware 19801.

          IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation as of June 9, 2004.

By:	/s/ Mary Kim E. Shipp
	Mary Kim E. Shipp
	Authorized Person