DR. ROGER THOMAS WILLIAMS MD
NPI 1467643650
Anesthesiology in Gatesville, TX
About Dr. Roger Thomas Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. ROGER THOMAS WILLIAMS MD (NPI 1467643650) is an individual anesthesiology provider in Gatesville, Texas, licensed in Texas (M9095) and active in the NPI registry since August 2007. He is enrolled in Medicare PECOS, is affiliated with Shannon Medical Center, and is a graduate of University Of Texas Medical Branch At Galveston (2004).
NPPES Registry Identity
Specialties & Licenses
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 and accepts Medicare assignment
Dr. Roger Thomas Williams 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.
Medicare Billing Reassignments
2Medicare enrollment records show Roger Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Gatesville, TX 76528
- Reassigned Medicare billing, Texas enrollment
- 78 clinicians in this Medicare group
San Angelo, TX 76903
- Reassigned Medicare billing, Texas enrollment
- 671 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Shannon Medical Center
Acute Care Hospitals · San Angelo, TXCoryell Memorial Hospital
Critical Access Hospitals · Gatesville, TXOther Providers at the Same Location NPPES 20
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 Roger Williams's NPI number?
The NPI number for Roger Williams is 1467643650. It was assigned to this individual provider in the NPPES registry on August 5, 2007.
Where is Roger Williams located?
Roger Williams practices at 1507 W Main St, Gatesville, TX 76528. The listed phone number is (254) 865-8251.
What is Roger Williams's specialty?
The primary specialty registered for this NPI is Anesthesiology with taxonomy code 207L00000X.
Is Roger Williams enrolled in Medicare?
Yes. Roger 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 Roger Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Roger Williams reassigns Medicare benefits to 2 organizations: Coryell County Memorial Hospital Authority (Gatesville, TX) and Shannon Clinic (San Angelo, TX). 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 Roger Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Roger Williams accept?
Health plans from Ambetter from Arizona Complete Health, Ambetter from Arkansas Health & Wellness, Ambetter from Louisiana Healthcare Connections, Ambetter from Superior HealthPlan and Ambetter of Oklahoma and 3 other insurers list Roger 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 Roger Williams affiliated with any hospitals?
According to CMS data, Roger Williams is affiliated with Shannon Medical Center and Coryell Memorial Hospital.
When was this NPI record last updated?
The NPPES record for Roger Williams was last updated on January 26, 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.
# Dr. Roger Thomas Williams, MD · NPI 1467643650
Anesthesiology physician in Gatesville, Texas. Individual provider, active in the CMS NPPES registry since August 5, 2007.
## Identity
- **NPI:** 1467643650 (Entity type: Individual)
- **Enumerated:** August 5, 2007
- **Primary specialty:** Anesthesiology · taxonomy 207L00000X
- **State license:** M9095 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 1507 W MAIN ST, Gatesville, TX 76528-1024
- **Phone:** (254) 865-8251 · **Fax:** (254) 248-6306
## 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): Coryell County Memorial Hospital Authority (NPI 1528195062, Gatesville, TX); Shannon Clinic (NPI 1770587149, San Angelo, TX) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Medical Branch At Galveston, class of 2004
## Record status
- **NPPES last updated:** January 26, 2024
- **Other identifiers:** Other 942074701
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Source: [NPI Profile](https://npiprofile.com/npi/1467643650) · Data from the CMS NPPES public registry.