Exhibit 3.354

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 “WARREN OHIO REHAB HOSPITAL COMPANY, LLC” AS RECEIVED AND FILED IN THIS OFFICE.

THE FOLLOWING DOCUMENTS HAVE BEEN CERTIFIED:

CERTIFICATE OF FORMATION, FILED THE FOURTH DAY OF AUGUST, A.D. 2010, AT 12:51 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, “WARREN OHIO REHAB HOSPITAL COMPANY, LLC”.

4856131 8100H		/s/ Jeffrey W. Bullock Jeffrey W. Bullock, Secretary of State AUTHENTICATION: 9120489
111142512		DATE: 10-27-11
You may verify this certificate online at corp.delaware.gov/authver.shtml

State of Delaware

Secretary of State

Division of Corporations

Delivered 01:11 PM 08/04/2010

FILED 12:51 PM 08/04/2010

SRV 100800476 - 4856131 FILE

STATE of DELAWARE

LIMITED LIABILITY COMPANY

CERTIFICATE of FORMATION

• First: The name of the limited liability company is Warren Ohio Rehab Hospital Company, LLC.

• Second: The address of its registered office in the State of Delaware is 2711 Centerville Road, Suite 400 in the City of Wilmington (New Castle County). The name of its Registered agent at such address is Corporation Service Company.

• Third: (Use this paragraph only if the company is to have a specific effective date of dissolution.) “The latest date on which the limited liability company is to dissolve is                             .”

• Fourth: (Insert any other matters the members determine to include herein.)

In Witness Whereof, the undersigned have executed this Certificate of Formation of Warren Ohio Rehab Hospital Company, LLC this 4th day of August, 2010.

BY:	/s/ Kristie Putman
	Authorized Person(s)
NAME:	Kristie Putman, Organizer
	Type or Print