Quick answers
- Which hospitals does Mark E. Armstrong work at?
- Medicare's official clinician data lists Mark E. Armstrong at 2 hospitals: Geisinger Jersey Shore Hospital and Geisinger-Lewistown Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark E. Armstrong see patients?
- Medicare's clinician data lists 6 practice locations, including Danville, PA, Jersey Shore, PA and Lewistown, PA. Call before your visit to confirm the address.
- What is Mark E. Armstrong's specialty?
- Medicare lists General Surgery as the primary specialty.
- Does Mark E. Armstrong accept Medicare assignment?
- Yes. Medicare's clinician data says Mark E. Armstrong 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 E. Armstrong?
- (717) 242-2711, as listed in official Medicare / NPI Registry data.
- What is Mark E. Armstrong's NPI number?
- 1013981711. 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 E. Armstrong works
Medicare's Facility Affiliation Data lists Mark E. Armstrong at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Geisinger Jersey Shore HospitalJersey Shore, PA · Critical Access Hospital · CCN 391300
- Geisinger-Lewistown HospitalLewistown, PA · Acute Care Hospital · CCN 390048
Practice locations
Addresses where Mark E. Armstrong is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 6; the Medicare profile lists all.
- 100 N Academy AveDanville, PA 17822
- 1020 Thompson StJersey Shore, PA 17740
- 27 Sandy LnLewistown, PA 17044 (717) 242‑2711
- 400 Highland AveLewistown, PA 17044
- 68 Spring St, Suite 203Lock Haven, PA 17745 (800) 230‑4564
Group practices
Medicare enrollment lists Mark E. Armstrong as a member of these groups (CMS data updated 2026-10-02).
- Geisinger Clinic3,467 clinicians in the group
- Geisinger-Hm Joint Venture LLC422 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Danville
Clinicians with the same Medicare primary specialty in Danville, PA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1013981711 |
| 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