EXHIBIT 3.331

STATE OF DELAWARE
SECRETARY OF STATE
DIVISION OF CORPORATIONS
FILED 09:00 AM 02/03/1999
991044649 — 3001003

CERTIFICATE OF FORMATION
OF
VHC MEDICAL, LLC

Under Section 18-201 of the
Delaware Limited Liability Company Act

FIRST: The name of the limited liability company is VHC Medical, LLC (the “Company”).

SECOND: The address of the registered office of the Company in the State of Delaware is 1013 Centre Road, Wilmington, Delaware 19805.

THIRD: The name and address of the Company’s registered agent for service of process is Corporation Service Company, 1013 Centre Road, Wilmington, Delaware 19805,

IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation as of February 3, 1999.

By: /s/ John M. Franck II

Name: John M. Franck II

Title: Authorized Person

STATE OF DELAWARE
SECRETARY OF STATE
DIVISION OF CORPORATIONS
FILED 02:15 PM 04/22/1999
991159245 — 3001003

CERTIFICATE OF MERGER

OF

VICTORIA HOSPITAL CORPORATION

INTO

VHC MEDICAL, LLC

Pursuant to Section 18-209 of the
Delaware Limited Liability Company Act

The undersigned limited liability company and corporation DO HEREBY CERTIFY:

FIRST: The name and the state of formation or organization of each of the constituent entities to the merger are as follows:

Name	State of Formation or Organization
VHC Medical, LLC (the “LLC”)	Delaware
Victoria Hospital Corporation (the “Company”)	Texas

SECOND: An Agreement and Plan of Merger between the constituent entities to the merger (the “Merger Agreement”) has been approved and executed by each of the constituent entities to the merger.

THIRD: The Company shall be merged with and into the LLC, with the LLC being the surviving entity (the “Surviving Entity”) in the merger, and the name of the Surviving Entity shall be VHC Medical, LLC.

FOURTH: The Certificate of Formation of the LLC at the effective time of the merger shall be the Certificate of Formation of the Surviving Entity.

FIFTH: The executed Merger Agreement is on file at the principal place of business of the Surviving Entity. The address of the Surviving Entity is One Park Plaza, Nashville, Tennessee 37203.

SIXTH: A copy of the Merger Agreement will be furnished by the Surviving Entity, on request and without cost, to any shareholder or member, as the case may be, of the constituent entities.

SEVENTH: This Certificate of Merger shall be effective on April 22, 1999.

* * * * *

IN WITNESS WHEREOF, this Certificate of Merger has been executed on this 21st day of April, 1999.

VHC MEDICAL, LLC

By: /s/ John M. Franck II
Name: John M. Franck II
Title: Manager

VICTORIA HOSPITAL CORPORATION

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By: /s/ R. Milton Johnson
Name: R. Milton Johnson
Title: Vice President

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