Quick answers
- Where does Francis M. Williams see patients?
- Medicare's clinician data lists 1 practice location in San Antonio, TX. Call before your visit to confirm the address.
- What is Francis M. Williams's specialty?
- Medicare lists Rheumatology as the primary specialty, and also Internal Medicine.
- Does Francis M. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Francis M. Williams accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Francis M. Williams?
- (210) 558-0122, as listed in official Medicare / NPI Registry data.
- What is Francis M. Williams's NPI number?
- 1275519449. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Practice locations
Addresses where Francis M. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 8715 Village DrSan Antonio, TX 78217 (210) 558‑0122
Group practices
Medicare enrollment lists Francis M. Williams as a member of this group (CMS data updated 2026-10-02).
- Wellmed Networks, Inc.112 clinicians in the group
Specialties
- Rheumatologyprimary
- Internal Medicinealso
Other rheumatologists in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At Houston |
| Graduation year | 1992 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1275519449 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians