Quick answers
- Which hospitals does Mark L. Douglas work at?
- Medicare's official clinician data lists Mark L. Douglas at 2 hospitals: Charleston Area Medical Center and Thomas Memorial Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark L. Douglas see patients?
- Medicare's clinician data lists 3 practice locations, including Cross Lanes, WV and Charleston, WV. Call before your visit to confirm the address.
- What is Mark L. Douglas's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Mark L. Douglas accept Medicare assignment?
- Yes. Medicare's clinician data says Mark L. Douglas accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Mark L. Douglas?
- (304) 776-5594, as listed in official Medicare / NPI Registry data.
- What is Mark L. Douglas's NPI number?
- 1306974464. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark L. Douglas works
Medicare's Facility Affiliation Data lists Mark L. Douglas at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Charleston Area Medical CenterCharleston, WV · Acute Care Hospital · CCN 510022
- Thomas Memorial HospitalSouth Charleston, WV · Acute Care Hospital · CCN 510029
Practice locations
Addresses where Mark L. Douglas is enrolled with Medicare (CMS data updated 2026-10-02).
- 5098 W Washington St, Suite 408Cross Lanes, WV 25313
- 5098 Washington St W, Suite 408Charleston, WV 25313
- 5098 Washington St W, Suite 408Cross Lanes, WV 25313 (304) 776‑5594
Specialties
- Internal Medicineprimary
Other internal medicine doctors in West Virginia
Clinicians with the same Medicare primary specialty in West Virginia — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | West Virginia School Of Osteopathic Medicine |
| Graduation year | 1989 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1306974464 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians