DR. BRETT T WILLIAMS M.D.
NPI 1265505374
Emergency Medicine in Buffalo, NY
About Dr. Brett T Williams M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. BRETT T WILLIAMS M.D. (NPI 1265505374) is an individual emergency medicine provider in Buffalo, New York, licensed in New York (241958) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS, is affiliated with Sarasota Memorial Hospital, and is a graduate of State University Of New York At Buffalo School Of Medicine (2005).
NPPES Registry Identity
Specialties & Licenses
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
Dr. Brett T Williams M.d. 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 Brett Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Sarasota, FL 34239
- Reassigned Medicare billing, Florida enrollment
- 112 clinicians in this Medicare group
Sarasota, FL 34231
- Reassigned Medicare billing, Florida enrollment
- 107 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 4
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.
Hospital Affiliations CMS Care Compare 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Sarasota Memorial Hospital
Acute Care Hospitals · Sarasota, FLSarasota Memorial Hospital - Venice
Acute Care Hospitals · North Venice, FLPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14203 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
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 Brett Williams's NPI number?
The NPI number for Brett Williams is 1265505374. It was assigned to this individual provider in the NPPES registry on November 16, 2006.
Where is Brett Williams located?
Brett Williams practices at Buffalo General Hospital Department Of Emergency Medic 100 High St, Buffalo, NY 14203. The listed phone number is (716) 859-1499.
What is Brett Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Brett Williams enrolled in Medicare?
Yes. Brett 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 Brett Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Brett Williams reassigns Medicare benefits to 2 organizations: Global Physician Network LLC Series I (Sarasota, FL) and Global Physician Network LLC Series II (Sarasota, FL). 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 Brett Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Brett Williams affiliated with any hospitals?
According to CMS data, Brett Williams is affiliated with Sarasota Memorial Hospital and Sarasota Memorial Hospital - Venice.
When was this NPI record last updated?
The NPPES record for Brett Williams was last updated on July 8, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 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.
# Dr. Brett T Williams, M.D. · NPI 1265505374
Emergency Medicine physician in Buffalo, New York. Individual provider, active in the CMS NPPES registry since November 16, 2006.
## Identity
- **NPI:** 1265505374 (Entity type: Individual)
- **Enumerated:** November 16, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 241958 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** BUFFALO GENERAL HOSPITAL DEPARTMENT OF EMERGENCY MEDIC, 100 HIGH ST, Buffalo, NY 14203
- **Phone:** (716) 859-1499
## 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): Global Physician Network LLC Series I (NPI 1316467525, Sarasota, FL); Global Physician Network LLC Series II (NPI 1821518028, Sarasota, FL) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** State University Of New York At Buffalo School Of Medicine, class of 2005
## Record status
- **NPPES last updated:** July 8, 2007
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Source: [NPI Profile](https://npiprofile.com/npi/1265505374) · Data from the CMS NPPES public registry.