JAMES BRIAN WILLIAMS DO
NPI 1477512960
Emergency Medicine in Tulsa, OK
About James Brian Williams Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JAMES BRIAN WILLIAMS DO (NPI 1477512960) is an individual emergency medicine provider in Tulsa, Oklahoma, licensed in Oklahoma (4004) and active in the NPI registry since March 2006. He is enrolled in Medicare PECOS.
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 (PECOS)
James Brian Williams Do is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
4Medicare enrollment records show James Williams reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Stillwater, OK 74074
- Reassigned Medicare billing, Oklahoma enrollment
- 298 clinicians in this Medicare group
Oklahoma City, OK 73102
- Reassigned Medicare billing, Oklahoma enrollment
- Medicare enrollment name: Emergency Physicians Of Mid-America PC
- 310 clinicians in this Medicare group
Norman, OK 73071
- Reassigned Medicare billing, Oklahoma enrollment
- 418 clinicians in this Medicare group
Lawton, OK 73505
- Reassigned Medicare billing, Oklahoma enrollment
- 96 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.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 74146 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
TULSA, OK 74146
TULSA, OK 74146
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 James Williams's NPI number?
The NPI number for James Williams is 1477512960. It was assigned to this individual provider in the NPPES registry on March 22, 2006.
Where is James Williams located?
James Williams practices at 4500 S Garnett Rd Ste 919, Tulsa, OK 74146. The listed phone number is (918) 728-6145.
What is James Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is James Williams enrolled in Medicare?
Yes. James Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for James Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), James Williams reassigns Medicare benefits to 4 organizations: South Central Emergency Services PC (Stillwater, OK), Emergency Physicians Of Mid-America, P.C. (Oklahoma City, OK), Emergency Services Of Oklahoma PC (Norman, OK) and Oklahoma Emergency Services PC (Lawton, OK). 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 James 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 James Williams was last updated on July 13, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 months 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.
# James Brian Williams, DO · NPI 1477512960
Emergency Medicine physician in Tulsa, Oklahoma. Individual provider, active in the CMS NPPES registry since March 22, 2006.
## Identity
- **NPI:** 1477512960 (Entity type: Individual)
- **Enumerated:** March 22, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 4004 (Oklahoma)
- **Sole proprietor:** No
## Practice location
- **Address:** 4500 S GARNETT RD, STE 919, Tulsa, OK 74146-5229
- **Phone:** (918) 728-6145
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): South Central Emergency Services PC (NPI 1558663724, Stillwater, OK); Emergency Physicians Of Mid-America, P.C. (NPI 1063825297, Oklahoma City, OK); Emergency Services Of Oklahoma PC (NPI 1215249891, Norman, OK); Oklahoma Emergency Services PC (NPI 1114239795, Lawton, OK) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** July 13, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1477512960) · Data from the CMS NPPES public registry.