DR. DEBRA WILLIAMS MD
NPI 1609870930
Obstetrics & Gynecology in San Antonio, TX
About Dr. Debra Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. DEBRA WILLIAMS MD (NPI 1609870930) is an individual obstetrics & gynecology provider in San Antonio, Texas, licensed in Texas (H6707) and active in the NPI registry since June 2005. She is enrolled in Medicare PECOS and is a graduate of University Of Texas Medical Branch At Galveston (1988).
NPPES Registry Identity
Specialties & Licenses
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. Debra 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 Debra Williams reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Antonio, TX 78258
- Reassigned Medicare billing, Texas enrollment
- 11 clinicians in this Medicare group
Fort Defiance, AZ 86504
- Reassigned Medicare billing, Texas enrollment
- 518 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
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 78258 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.
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
SAN ANTONIO, TX 78258
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 Debra Williams's NPI number?
The NPI number for Debra Williams is 1609870930. It was assigned to this individual provider in the NPPES registry on June 1, 2005.
Where is Debra Williams located?
Debra Williams practices at 502 Madison Oak Dr Suite 440, San Antonio, TX 78258. The listed phone number is (210) 946-1300.
What is Debra Williams's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Debra Williams enrolled in Medicare?
Yes. Debra 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 Debra Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Debra Williams reassigns Medicare benefits to 2 organizations: Women Partners In Ob/Gyn LLP (San Antonio, TX) and The Fort Defiance Indian Hospital Board, Incorporation (Fort Defiance, AZ). 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 Debra Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Debra Williams accept?
Health plans from Blue Cross Blue Shield of Arizona list Debra 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.
When was this NPI record last updated?
The NPPES record for Debra Williams was last updated on November 3, 2011. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 15 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. Debra Williams, MD · NPI 1609870930
Obstetrics & Gynecology physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since June 1, 2005.
## Identity
- **NPI:** 1609870930 (Entity type: Individual)
- **Enumerated:** June 1, 2005
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** H6707 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 502 MADISON OAK DR, SUITE 440, San Antonio, TX 78258-4084
- **Phone:** (210) 946-1300 · **Fax:** (210) 946-1700
## 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): Women Partners In Ob/Gyn LLP (NPI 1235167867, San Antonio, TX); The Fort Defiance Indian Hospital Board, Incorporation (NPI 1477876639, Fort Defiance, AZ) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Texas Medical Branch At Galveston, class of 1988
## Record status
- **NPPES last updated:** November 3, 2011
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Source: [NPI Profile](https://npiprofile.com/npi/1609870930) · Data from the CMS NPPES public registry.