Quick answers
- Which hospitals does Aston B. Williams work at?
- Medicare's official clinician data lists Aston B. Williams at 1 hospital: Kaleida Health. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Aston B. Williams see patients?
- Medicare's clinician data lists 2 practice locations, including Buffalo, NY. Call before your visit to confirm the address.
- What is Aston B. Williams's specialty?
- Medicare lists Internal Medicine as the primary specialty, and also Gastroenterology.
- Does Aston B. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Aston B. Williams 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.
- Does Aston B. Williams offer telehealth?
- Medicare's clinician data says Aston B. Williams offers telehealth services. Ask the office which visits can be done by video or phone.
- What is the phone number for Aston B. Williams?
- (716) 832-1776, as listed in official Medicare / NPI Registry data.
- What is Aston B. Williams's NPI number?
- 1558423921. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Aston B. Williams works
Medicare's Facility Affiliation Data lists Aston B. Williams at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Kaleida HealthBuffalo, NY · Acute Care Hospital · CCN 330005
Practice locations
Addresses where Aston B. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 2804 Main StBuffalo, NY 14214
- 2804 Main StBuffalo, NY 14217 (716) 832‑1776
Specialties
- Internal Medicineprimary
- Gastroenterologyalso
Other internal medicine doctors in Buffalo
Clinicians with the same Medicare primary specialty in Buffalo, NY — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Temple University School Of Medicine |
| Graduation year | 1975 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1558423921 |
| 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