Quick answers
- Which hospitals does Mark A. Geist work at?
- Medicare's official clinician data lists Mark A. Geist at 5 hospitals: Overlook Medical Center, Tristar Centennial Medical Center, Tristar Hendersonville Medical Center, Tristar Horizon Medical Center and Tristar Skyline Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Geist see patients?
- Medicare's clinician data lists 7 practice locations, including Clarks Summit, PA, Lutherville, MD and Providence, RI. Call before your visit to confirm the address.
- What is Mark A. Geist's specialty?
- Medicare lists Diagnostic Radiology as the primary specialty.
- Does Mark A. Geist accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Geist 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 A. Geist?
- (952) 595-1100, as listed in official Medicare / NPI Registry data.
- What is Mark A. Geist's NPI number?
- 1982623450. 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 A. Geist works
Medicare's Facility Affiliation Data lists Mark A. Geist at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Overlook Medical CenterSummit, NJ · Acute Care Hospital · CCN 310051
- Tristar Centennial Medical CenterNashville, TN · Acute Care Hospital · CCN 440161
- Tristar Hendersonville Medical CenterHendersonville, TN · Acute Care Hospital · CCN 440194
- Tristar Horizon Medical CenterDickson, TN · Acute Care Hospital · CCN 440046
- Tristar Skyline Medical CenterNashville, TN · Acute Care Hospital · CCN 440006
Practice locations
Addresses where Mark A. Geist is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1002 Oakford WoodsClarks Summit, PA 18411 (952) 595‑1100
- 12 Valley Hi CtLutherville, MD 21093 (952) 595‑1100
- 123 Lorimer AveProvidence, RI 02906 (615) 312‑0600
- 301 Saint Paul StBaltimore, MD 21202 (410) 659‑2800
- 48 Bitting RdAlburtis, PA 18011 (888) 972‑9700
Group practices
Medicare enrollment lists Mark A. Geist as a member of these groups (CMS data updated 2026-10-02).
- Radiology Alliance PC455 clinicians in the group
- Virtual Radiologic Professionals LLC397 clinicians in the group
- St Paul Place Specialists, Inc.336 clinicians in the group
- Advanced Radiology P A188 clinicians in the group
- Englewood Radiologic Group P A132 clinicians in the group
Specialties
- Diagnostic Radiologyprimary
Other radiologists in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Rochester School Of Medicine And Dentistry |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982623450 |
| 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