Clinicians affiliated with Mark Twain Medical Center

Critical Access Hospitals · Voluntary non-profit - Other · 768 Mountain Ranch Rd, San Andreas, CA 95249 · CCN 051332

Affiliation snapshotNovember 2, 2026CMS Doctors and Clinicians Facility Affiliation file, current snapshot (no end-of-2024 archive), applied to 2024
Activity year2024Medicare Part B claims, Original Medicare fee-for-service

174 clinicians affiliated with Mark Twain Medical Center are in the 2024 Medicare Part B data (205 listed in the affiliation file).

Each clinician's exact figures are in their Physician Report, from their page. View sample report · Already purchased? Open your report (earlier Local report and passes)

Affiliated clinicians by specialty, 2024

All specialties · Internal Medicine (19) · Cardiology (17) · Diagnostic Radiology (15) · Family Practice (14) · Nurse Practitioner (11) · Physician Assistant (11) · Hematology-Oncology (8) · Orthopedic Surgery (8) · Urology (8) · Nephrology (6) · Pulmonary Disease (6) · Hospitalist (5) · Anesthesiology (4) · Emergency Medicine (4) · Gastroenterology (4) · Interventional Cardiology (4) · Neurology (4) · Endocrinology (3) · General Surgery (3) · Rheumatology (3) · Medical Oncology (2) · Physical Medicine and Rehabilitation (2) · Podiatry (2) · Radiation Oncology (2) · Cardiac Surgery (1) · Clinical Cardiac Electrophysiology (1) · Critical Care (Intensivists) (1) · General Practice (1) · Hematology (1) · Interventional Pain Management (1) · Interventional Radiology (1) · Neurosurgery (1) · Pathology (1)

General Practice affiliated with Mark Twain Medical Center, 2024

Alphabetical by last name; 1.

NameCity
Gary R Johnson, M.D.San Andreas, CA

Affiliation comes from the CMS Doctors and Clinicians Facility Affiliation file, hospital rows only; name, address and type from the CMS Hospital General Information file. CMS does not publish an end-of-year archive of the affiliation file, so the current snapshot is applied to the latest data year. A clinician listed with several hospitals or groups appears on each of their pages. How hospital pages are built