Quick answers
- Which hospitals does Mark D. Beyer work at?
- Medicare's official clinician data lists Mark D. Beyer at 1 hospital: UPMC Muncy. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Beyer see patients?
- Medicare's clinician data lists 1 practice location in Williamsport, PA. Call before your visit to confirm the address.
- What is Mark D. Beyer's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Mark D. Beyer accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Beyer 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 D. Beyer?
- (570) 321-2000, as listed in official Medicare / NPI Registry data.
- What is Mark D. Beyer's NPI number?
- 1568510519. 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 D. Beyer works
Medicare's Facility Affiliation Data lists Mark D. Beyer at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- UPMC MuncyMuncy, PA · Critical Access Hospital · CCN 391301
Practice locations
Addresses where Mark D. Beyer is enrolled with Medicare (CMS data updated 2026-10-02).
- 700 High StWilliamsport, PA 17701 (570) 321‑2000
Group practices
Medicare enrollment lists Mark D. Beyer as a member of this group (CMS data updated 2026-10-02).
- Susquehanna Physician Services612 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Williamsport
Clinicians with the same Medicare primary specialty in Williamsport, PA — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Philadelphia College Of Osteopathic Medicine |
| Graduation year | 1988 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568510519 |
| 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