Exhibit 3.299

STATE OF DELAWARE SECRETARY OF STATE

DIVISION OF CORPORATIONS

FILED 09:00 AM 11/09/1998
981431076 — 2964587

CERTIFICATE OF FORMATION
OF SAN ANGELO COMMUNITY MEDICAL CENTER, LLC

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

FIRST: The name of the limited liability company is San Angelo Community Medical Center, 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 October 30 1998.

/s/John M. Franck II
Name: John M. Franck II
Title: Authorized Person