DR. JAMES S. WILLIAMS MD
NPI 1447353750
Emergency Medicine in Big Lake, TX
About Dr. James S. Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. JAMES S. WILLIAMS MD (NPI 1447353750) is an individual emergency medicine provider in Big Lake, Texas, licensed in Wisconsin (38641) and active in the NPI registry since September 2006. He is enrolled in Medicare PECOS, is affiliated with Reagan Memorial Hospital, and is a graduate of Other (1991).
NPPES Registry Identity
Specialties & Licenses 2
Other Identifiers 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Dr. James S. Williams Md 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.
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,338 clinicians in this Medicare group
Lubbock, TX 79401
- Reassigned Medicare billing, Texas enrollment
- 1,439 clinicians in this Medicare group
Victoria, TX 77901
- Reassigned Medicare billing, Texas enrollment
- 96 clinicians in this Medicare group
Menomonee Falls, WI 53051
- Reassigned Medicare billing, Wisconsin enrollment
- 2,294 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Reagan Memorial Hospital
Critical Access Hospitals · Big Lake, TXPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 76932 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 2
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
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 1447353750. It was assigned to this individual provider in the NPPES registry on September 6, 2006.
Where is James Williams located?
James Williams practices at 800 N Main Ave, Big Lake, TX 76932. The listed phone number is (325) 481-2183.
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: Concord Medical Group PLLC (Lubbock, TX), Concord Medical Group Of Texas PLLC (Lubbock, TX), Oleander Emergency Medicine Associates PA (Victoria, TX) and Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (Menomonee Falls, WI). 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.
What insurance does James Williams accept?
Health plans from Blue Cross and Blue Shield of Texas, CHRISTUS Health Plan, Oscar Health, Oscar Insurance Company and UnitedHealthcare list James Williams as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is James Williams affiliated with any hospitals?
According to CMS data, James Williams is affiliated with Reagan Memorial Hospital.
When was this NPI record last updated?
The NPPES record for James Williams was last updated on December 9, 2019. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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. James S. Williams, MD · NPI 1447353750
Emergency Medicine physician in Big Lake, Texas. Individual provider, active in the CMS NPPES registry since September 6, 2006.
## Identity
- **NPI:** 1447353750 (Entity type: Individual)
- **Enumerated:** September 6, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 38641 (Wisconsin)
- **Sole proprietor:** No
## Practice location
- **Address:** 800 N MAIN AVE, Big Lake, TX 76932-3900
- **Phone:** (325) 481-2183
## 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): Concord Medical Group PLLC (NPI 1083630610, Lubbock, TX); Concord Medical Group Of Texas PLLC (NPI 1750790762, Lubbock, TX); Oleander Emergency Medicine Associates PA (NPI 1346515103, Victoria, TX); Froedtert & the Medical College Of Wisconsin Community Physicians, Inc. (NPI 1568787448, Menomonee Falls, WI) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1991
## Record status
- **NPPES last updated:** December 9, 2019
- **Other identifiers:** Other 8CX167 (TX)
---
Source: [NPI Profile](https://npiprofile.com/npi/1447353750) · Data from the CMS NPPES public registry.