EXHIBIT 3.45

Delaware

The First State

     I, HARRIET SMITH WINDSOR, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF FORMATION OF “MUSKOGEE PHYSICIAN GROUP, LLC”, FILED IN THIS OFFICE ON THE SECOND DAY OF FEBRUARY, A.D. 2007, AT 6:58 O’CLOCK P.M.

/s/ Harriett Smith Windsor  

Harriet Smith Windsor, Secretary of State 

4295698     8100	AUTHENTICATION: 5406722
070121783	Date: 02-05-07

CERTIFICATE OF FORMATION

OF

MUSKOGEE PHYSICIAN GROUP, LLC

     Pursuant to Section 18-201 of the Delaware Limited Liability Company Act (the “Act”), the undersigned, desiring to form a limited liability company, does hereby certify as follows:

     1. The name of the limited liability company is Muskogee Physician Group, LLC (the “LLC’).

     2. The address of the LLC’s registered office in the State of Delaware is Corporation Trust Center, 1209 Orange Street, Wilmington, DE 19801. The name of the registered agent is The Corporation Trust Company.

     3. The LLC shall have the power and authority to carry on any business permitted by, and to have and exercise all of the powers and rights conferred by, the Act as amended from time to time or any successor provisions thereto.

     4. This Certificate of Formation shall be effective upon filing with the Delaware Secretary of State.

     IN WITNESS WHEREOF, the undersigned has executed this Certificate of Formation on this 31^st day of January, 2007.

Muskogee Physician Group, LLC
 

/s/ D. Andrew Slusser  

D. Andrew Slusser, Authorized Person 

STATE OF DELAWARE
SECRETARY OF STATE
DIVISION OF CORPORATIONS
DELIVERED 07:49 PM 02/02/2007
FILED 06:58 PM 02/02/2007
SRV 070121783 — 4295698 FILE