Quick answers
- Which hospitals does Mark D. Chazen work at?
- Medicare's official clinician data lists Mark D. Chazen at 5 hospitals: Bertrand Chaffee Hospital, Erie County Medical Center, Kaleida Health, Olean General Hospital and Sisters of Charity Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark D. Chazen see patients?
- Medicare's clinician data lists 3 practice locations, including Springville, NY, Cheektowaga, NY and Buffalo, NY. Call before your visit to confirm the address.
- What is Mark D. Chazen's specialty?
- Medicare lists Urology as the primary specialty.
- Does Mark D. Chazen accept Medicare assignment?
- Yes. Medicare's clinician data says Mark D. Chazen 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. Chazen?
- (716) 844-5000, as listed in official Medicare / NPI Registry data.
- What is Mark D. Chazen's NPI number?
- 1518931989. 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. Chazen works
Medicare's Facility Affiliation Data lists Mark D. Chazen at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Bertrand Chaffee HospitalSpringville, NY · Acute Care Hospital · CCN 330111
- Erie County Medical CenterBuffalo, NY · Acute Care Hospital · CCN 330219
- Kaleida HealthBuffalo, NY · Acute Care Hospital · CCN 330005
- Olean General HospitalOlean, NY · Acute Care Hospital · CCN 330103
- Sisters of Charity HospitalBuffalo, NY · Acute Care Hospital · CCN 330078
Practice locations
Addresses where Mark D. Chazen is enrolled with Medicare (CMS data updated 2026-10-02).
- 21 E Main StSpringville, NY 14141 (716) 844‑5000
- 3085 Harlem Rd, Suite 200Cheektowaga, NY 14225 (716) 844‑5000
- 462 Grider StBuffalo, NY 14215 (716) 898‑3000
Group practices
Medicare enrollment lists Mark D. Chazen as a member of these groups (CMS data updated 2026-10-02).
- Erie County Medical Center Corporation319 clinicians in the group
- Great Lakes Physician PC66 clinicians in the group
Specialties
- Urologyprimary
Other urologists in New York
Clinicians with the same Medicare primary specialty in New York — not a recommendation.
Clinician information
| Medical school | University Of Rochester School Of Medicine And Dentistry |
|---|---|
| Graduation year | 1997 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1518931989 |
| 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