Peter Fields, MD
Gastroenterology Physician · Williamsville, NY
Peter Fields, MD is a gastroenterology physician with a practice address in Williamsville, New York, and NPI 1790246452, issued on Mar 26, 2019. Check the license (New York 318131, as entered in NPPES) on the NYS Education Department, Office of the Professions; the Medicare figures below come from public CMS files.
- Name
- Peter Fields
- Credential
- MD
- Primary taxonomy
- Gastroenterology Physician 207RG0100X
- License number
- 318131 NY
Self-reported in NPPES; status is on the state search - Practice location
- 60 Maple RD Ste 1, Williamsville, NY 14221
- Phone
- (716) 626-5250
- Enumerated
- Mar 26, 2019
- Record last updated
- May 11, 2026
- Medicaid ID
- 07559759 NY
- Medicare enrollment
- Enrolled (PECOS I20250730000637); accepts Medicare assignment
- Medical or professional school
- State University Of New York At Buffalo School Of Medicine, 2019
- Entity
- Type 1 · individual
8 nearest gastroenterology physician records → All 1,797 in New York → Look up another NPI →
Also registered at 60 Maple RD Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maura Anson, AGNPAdult Health Nurse Practitioner1336939594
- Christopher ColemanMedical Physician Assistant1487484440
- Craig Keller, M.D.Gastroenterology Physician1831481365
- Jenna PerezAdult Health Nurse Practitioner1679403265
- John Picano, M.D.Gastroenterology Physician1003202615
- Ognian Pomakov, MDGastroenterology Physician1366583767
Verify Peter Fields in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersNYS Education Department, Office of the Professions
Search for license 318131Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
83% fewer Medicare Part D claims than the average gastroenterology physician in 2024
135 Medicare Part D claims for 26 beneficiaries, against an average of 811 among the 16,445 providers of this specialty who prescribed in Part D. Brand-name drugs were 27% of claims.
Most prescribed
- Pantoprazole Sodium28 claims
- Omeprazole21 claims
- Entecavir12 claims
- Humira(Cf) Pen12 claims
- Ursodiol12 claims
- Motegrity11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Gastroenterology Associates LLPWilliamsville, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter Fields among 1,797 gastroenterology physician records in New York
Peter Fields, MD is one of 1,797 gastroenterology physician records with a practice address in New York. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 96% of them.
- NPI issued2019 · 96% of these records are older, 2% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2019 · median 1999 among the 1,378 with a school on file
- Record last updated2026 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0100X and a New York practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Gastroenterology Physician providers in New York
There are 1,797 gastroenterology physician records in New York.
All 1,797 in New York → Every provider in Williamsville → Gastroenterology Physician nationwide →
The 8 gastroenterology physician records with the nearest ZIP codes
- Christopher Bartolone, M.D.Williamsville, NY 142211548246788
- Peter Bloom, M.D.Williamsville, NY 142211316923253
- Joseph Caruana, M.D.Williamsville, NY 142211134123417
- James Corasanti, MD, PHDWilliamsville, NY 142211750347068
- David Fay, M.D.Williamsville, NY 142211942286844
- David Garson, M.D.Williamsville, NY 142211457337388
- Jerald Giller, M.D.Williamsville, NY 142211376529370
- Richard Kaplan, M.D.Williamsville, NY 142211184600975
Common questions
What is Peter Fields, MD's NPI number?
Peter Fields, MD's National Provider Identifier (NPI) is 1790246452, issued on Mar 26, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Peter Fields, MD located?
The NPPES record lists a practice address at 60 Maple RD Ste 1, Williamsville, NY, 14221. Phone: (716) 626-5250. Providers update this record themselves, so call before visiting.
How can I verify Peter Fields, MD's license?
NPPES lists New York license number 318131, as entered by the provider. Search the NYS Education Department, Office of the Professions at https://www.op.nysed.gov/services/verifications/online-verification-searches. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Peter Fields, MD prescribe under Medicare Part D?
In 2024, Peter Fields, MD had 135 Medicare Part D claims for 26 beneficiaries; the average among gastroenterology physician prescribers was 811. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.