Quick answers
- Which hospitals does Mark R. Jajkowski work at?
- Medicare's official clinician data lists Mark R. Jajkowski at 2 hospitals: Mercy Hospital of Buffalo and Mount St. Mary's Hospital & Health Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark R. Jajkowski see patients?
- Medicare's clinician data lists 3 practice locations, including Buffalo, NY and Williamsville, NY. Call before your visit to confirm the address.
- What is Mark R. Jajkowski's specialty?
- Medicare lists Thoracic Surgery as the primary specialty, and also Internal Medicine.
- Does Mark R. Jajkowski accept Medicare assignment?
- Yes. Medicare's clinician data says Mark R. Jajkowski 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 R. Jajkowski?
- (716) 835-2966, as listed in official Medicare / NPI Registry data.
- What is Mark R. Jajkowski's NPI number?
- 1073628244. 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 R. Jajkowski works
Medicare's Facility Affiliation Data lists Mark R. Jajkowski at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Mercy Hospital of BuffaloBuffalo, NY · Acute Care Hospital · CCN 330279
- Mount St. Mary's Hospital & Health CenterLewiston, NY · Acute Care Hospital · CCN 330188
Practice locations
Addresses where Mark R. Jajkowski is enrolled with Medicare (CMS data updated 2026-10-02).
- 3435 Bailey AveBuffalo, NY 14215 (716) 835‑2966
- 565 Abbott RdBuffalo, NY 14220 (716) 826‑7000
- 825 Wehrle DrWilliamsville, NY 14221 (716) 634‑3243
Group practices
Medicare enrollment lists Mark R. Jajkowski as a member of these groups (CMS data updated 2026-10-02).
- Trinity Medical Wny PC207 clinicians in the group
- Mercy Hospital of Buffalo196 clinicians in the group
Specialties
- Thoracic Surgeryprimary
- Internal Medicinealso
Other thoracic surgeons in Buffalo
Clinicians with the same Medicare primary specialty in Buffalo, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | State University Of New York At Buffalo School Of Medicine |
| Graduation year | 1996 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1073628244 |
| 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