Quick answers
- Which hospitals does Les A. Zakrzewski work at?
- Medicare's official clinician data lists Les A. Zakrzewski at 2 hospitals: Mercy Hospital of Buffalo and Sisters of Charity Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Les A. Zakrzewski see patients?
- Medicare's clinician data lists 2 practice locations, including West Seneca, NY. Call before your visit to confirm the address.
- What is Les A. Zakrzewski's specialty?
- Medicare lists Internal Medicine as the primary specialty.
- Does Les A. Zakrzewski accept Medicare assignment?
- Medicare's clinician data says Les A. Zakrzewski may accept Medicare assignment (as of 2026-10-02). Ask the office whether they accept it for your visit.
- What is the phone number for Les A. Zakrzewski?
- (716) 675-0707, as listed in official Medicare / NPI Registry data.
- What is Les A. Zakrzewski's NPI number?
- 1467431577. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Les A. Zakrzewski works
Medicare's Facility Affiliation Data lists Les A. Zakrzewski 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
- Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · CCN 330078
Practice locations
Addresses where Les A. Zakrzewski is enrolled with Medicare (CMS data updated 2026-10-02).
- 1900 Ridge Rd, Suite 130West Seneca, NY 14224 (716) 675‑0707
- 721 Ctr RdWest Seneca, NY 14224 (716) 677‑4070
Group practices
Medicare enrollment lists Les A. Zakrzewski as a member of this group (CMS data updated 2026-10-02).
- Trinity Medical Wny PC207 clinicians in the group
Specialties
- Internal Medicineprimary
Other internal medicine doctors in West Seneca
Clinicians with the same Medicare primary specialty in West Seneca, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1467431577 |
| 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