PETER D WILLIAMS DO
NPI 1295780831
Anesthesiology in Cheektowaga, NY
About Peter D Williams Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
PETER D WILLIAMS DO (NPI 1295780831) is an individual anesthesiology provider in Cheektowaga, New York, licensed in New York (238809) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS, maintains a secondary practice location in Williamsville, and is a graduate of New York College Of Osteo Medicine Of New York Institute Of Technology (2002).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Peter D Williams Do 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.
Medicare Billing Reassignments
2Medicare enrollment records show Peter Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Buffalo, NY 14203
- Reassigned Medicare billing, New York enrollment
- 182 clinicians in this Medicare group
Watertown, NY 13601
- Reassigned Medicare billing, New York enrollment
- 84 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 3
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
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 Williams's NPI number?
The NPI number for Peter Williams is 1295780831. It was assigned to this individual provider in the NPPES registry on May 23, 2006.
Where is Peter Williams located?
Peter Williams practices at Atwal Surgery Center 3095 Harlem Rd, Cheektowaga, NY 14225. The listed phone number is (716) 323-6579.
What is Peter Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Peter Williams enrolled in Medicare?
Yes. Peter Williams 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.
Which organizations bill Medicare for Peter Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Peter Williams reassigns Medicare benefits to 2 organizations: Great Lakes Anesthesiology, PC (Buffalo, NY) and Jefferson Anesthesiologist Services PC (Watertown, NY). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Peter Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Peter Williams was last updated on January 31, 2024. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Peter D Williams, DO · NPI 1295780831
Anesthesiology physician in Cheektowaga, New York. Individual provider, active in the CMS NPPES registry since May 23, 2006.
## Identity
- **NPI:** 1295780831 (Entity type: Individual)
- **Enumerated:** May 23, 2006
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** 238809 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** ATWAL SURGERY CENTER, 3095 HARLEM RD, Cheektowaga, NY 14225-2500
- **Phone:** (716) 323-6579 · **Fax:** (716) 323-6659
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 2 organizations under Medicare reassignment (form CMS-855R): Great Lakes Anesthesiology, PC (NPI 1306852181, Buffalo, NY); Jefferson Anesthesiologist Services PC (NPI 1508818014, Watertown, NY) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** New York College Of Osteo Medicine Of New York Institute Of Technology, class of 2002
## Record status
- **NPPES last updated:** January 31, 2024
- **Other identifiers:** Medicaid 02758978 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1295780831) · Data from the CMS NPPES public registry.