DR. HOLLY LYNN WILLIAMS MD
NPI 1346256567
Surgery - Pediatric Surgery in San Antonio, TX
About Dr. Holly Lynn Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. HOLLY LYNN WILLIAMS MD (NPI 1346256567) is an individual pediatric surgery provider in San Antonio, Texas, licensed in Texas (L6216) and active in the NPI registry since July 2006. She is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of California, San Francisco School Of Medicine (1993).
NPPES Registry Identity
Specialties & Licenses 3
Secondary Practice Locations 3
Other Identifiers 2
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. Holly Lynn Williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
7Medicare enrollment records show Holly Williams reassigns Medicare billing to 7 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
San Antonio, TX 78207
- Reassigned Medicare billing, Texas enrollment
- 453 clinicians in this Medicare group
El Paso, TX 79905
- Reassigned Medicare billing, Texas enrollment
- 59 clinicians in this Medicare group
Urbana, IL 61801
- Reassigned Medicare billing, Illinois enrollment
- Medicare enrollment name: Carle Health Care Incorporated
- 2,516 clinicians in this Medicare group
Jacksonville, FL 32207
- Reassigned Medicare billing, Delaware enrollment
- 526 clinicians in this Medicare group
Rockford, IL 61103
- Reassigned Medicare billing, Illinois enrollment
- 1,375 clinicians in this Medicare group
Boynton Beach, FL 33426
- Reassigned Medicare billing, New York enrollment
- 7,712 clinicians in this Medicare group
Cleveland, OH 44106
- Reassigned Medicare billing, Ohio enrollment
- 3,958 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.
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 78207
SAN ANTONIO, TX 78207
SAN ANTONIO, TX 78207
SAN ANTONIO, TX 78207
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 Holly Williams's NPI number?
The NPI number for Holly Williams is 1346256567. It was assigned to this individual provider in the NPPES registry on July 31, 2006.
Where is Holly Williams located?
Holly Williams practices at 333 N Santa Rosa, San Antonio, TX 78207. The listed phone number is (210) 704-3030.
What is Holly Williams's specialty?
The primary specialty registered for this NPI is Surgery, specializing in Pediatric Surgery, with taxonomy code 2086S0120X.
Is Holly Williams enrolled in Medicare?
Yes. Holly Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Holly Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Holly Williams reassigns Medicare benefits to 7 organizations: Baylor College Of Medicine (San Antonio, TX), El Paso Children's Physician Group (El Paso, TX), Carle Health Medical Group (Urbana, IL), The Nemours Foundation (Jacksonville, FL), Rockford Health Physicians (Rockford, IL) and 2 more organizations, listed in the Medicare section above. 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 Holly Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Holly 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 4 other insurers list Holly 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 Holly Williams was last updated on September 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 52 days 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. Holly Lynn Williams, MD · NPI 1346256567
Pediatric Surgery physician in San Antonio, Texas. Individual provider, active in the CMS NPPES registry since July 31, 2006.
## Identity
- **NPI:** 1346256567 (Entity type: Individual)
- **Enumerated:** July 31, 2006
- **Primary specialty:** Surgery - Pediatric Surgery · taxonomy 2086S0120X
- **State license:** L6216 (Texas)
- **Sole proprietor:** No
## Practice location
- **Address:** 333 N SANTA ROSA, San Antonio, TX 78207-3108
- **Phone:** (210) 704-3030
## 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:** 7 organizations under Medicare reassignment (form CMS-855R): Baylor College Of Medicine (NPI 1285079764, San Antonio, TX); El Paso Children's Physician Group (NPI 1992067128, El Paso, TX); Carle Health Medical Group (NPI 1154653947, Urbana, IL); The Nemours Foundation (NPI 1265585806, Jacksonville, FL); Rockford Health Physicians (NPI 1023275278, Rockford, IL); and 2 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, San Francisco School Of Medicine, class of 1993
## Record status
- **NPPES last updated:** September 3, 2026
- **Other identifiers:** Medicaid 015123800 (MD); Medicaid 27-0271872 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1346256567) · Data from the CMS NPPES public registry.