Peter Fields, MD
NPI 1790246452 · Gastroenterology Physician · Williamsville, NY
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Peter Fields, MD is a Gastroenterology Physician provider in Williamsville, NY (NPI 1790246452).
Provider details
- NPI number
- 1790246452
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 318131 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 6 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Pantoprazole Sodium | 28 |
| Omeprazole | 21 |
| Entecavir | 12 |
| Adalimumabbrand: Humira(cf) Pen | 12 |
| Ursodiol | 12 |
| Prucalopride Succinatebrand: Motegrity | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Additional practice locations (1)
- Elm and Carlton StBuffalo, NY 14263-0001Phone: (716) 845-2300
Registry dates
- Enumerated
- 2019-03-26
- Last updated
- 2026-05-11
- Certified
- 2026-05-11
Frequently asked questions
- What is Peter Fields's NPI number?
- Peter Fields's National Provider Identifier (NPI) is 1790246452, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Peter Fields's specialty?
- Peter Fields is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Peter Fields located?
- Peter Fields's practice location on file with NPPES is 60 Maple Rd Ste 1, Williamsville, NY 14221-2917.
- What is Peter Fields's phone number?
- The practice phone number listed in the NPPES registry for Peter Fields is (716) 626-5250.
- Does Peter Fields accept Medicare?
- Peter Fields is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Peter Fields's NPI active?
- Yes — Peter Fields's NPI (1790246452) is active in the NPPES registry as of the last update on 2026-05-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.