Quick answers
- Which hospitals does Mark G. Nelson work at?
- Medicare's official clinician data lists Mark G. Nelson at 3 hospitals: Garrett Regional Medical Center, Potomac Valley Hospital and Western Maryland Regional Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark G. Nelson see patients?
- Medicare's clinician data lists 2 practice locations, including Cumberland, MD. Call before your visit to confirm the address.
- What is Mark G. Nelson's specialty?
- Medicare lists Cardiac Surgery as the primary specialty.
- Does Mark G. Nelson accept Medicare assignment?
- Yes. Medicare's clinician data says Mark G. Nelson 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 G. Nelson?
- (240) 964-8354, as listed in official Medicare / NPI Registry data.
- What is Mark G. Nelson's NPI number?
- 1134111743. 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 G. Nelson works
Medicare's Facility Affiliation Data lists Mark G. Nelson at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Garrett Regional Medical CenterOakland, MD · Acute Care Hospital · CCN 210017
- Potomac Valley HospitalKeyser, WV · Critical Access Hospital · CCN 511315
- Western Maryland Regional Medical CenterCumberland, MD · Acute Care Hospital · CCN 210027
Practice locations
Addresses where Mark G. Nelson is enrolled with Medicare (CMS data updated 2026-10-02).
- 12500 Willowbrook RdCumberland, MD 21502 (240) 964‑8354
- 12502 Willowbrook Rd, Suite 470Cumberland, MD 21502 (240) 964‑8724
Group practices
Medicare enrollment lists Mark G. Nelson as a member of this group (CMS data updated 2026-10-02).
- UPMC Western Maryland Health Services LLC162 clinicians in the group
Specialties
- Cardiac Surgeryprimary
Other cardiac surgeons in Maryland
Clinicians with the same Medicare primary specialty in Maryland — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Maryland School Of Medicine |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1134111743 |
| 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