DR. PETER FIELDS II MD
NPI 1790246452
Internal Medicine - Gastroenterology in Williamsville, NY
About Dr. Peter Fields Ii Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PETER FIELDS II MD (NPI 1790246452) is an individual gastroenterology provider in Williamsville, New York, licensed in New York (318131) and active in the NPI registry since March 2019. He is enrolled in Medicare PECOS, is affiliated with Kaleida Health, and maintains a secondary practice location in Buffalo.
NPPES Registry Identity
Specialties & Licenses
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Peter Fields Ii Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Kaleida Health
Acute Care Hospitals · Buffalo, NYSisters Of Charity Hospital
Acute Care Hospitals · Buffalo, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14221 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 11
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
WILLIAMSVILLE, NY 14221
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Peter Fields's NPI number?
The NPI number for Peter Fields is 1790246452. It was assigned to this individual provider in the NPPES registry on March 26, 2019.
Where is Peter Fields located?
Peter Fields practices at 60 Maple Rd Ste 1, Williamsville, NY 14221. The listed phone number is (716) 626-5250.
What is Peter Fields's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.
Is Peter Fields enrolled in Medicare?
Yes. Peter Fields is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Is Peter Fields affiliated with any hospitals?
According to CMS data, Peter Fields is affiliated with Kaleida Health and Sisters Of Charity Hospital.
When was this NPI record last updated?
The NPPES record for Peter Fields was last updated on May 11, 2026. NPI Profile syncs with the weekly NPPES data releases published by CMS.
