Quick answers
- Where does Robert C. Williams see patients?
- Medicare's clinician data lists 1 practice location in Napa, CA. Call before your visit to confirm the address.
- What is Robert C. Williams's specialty?
- Medicare lists Oral Surgery as the primary specialty, and also Dentist.
- Does Robert C. Williams accept Medicare assignment?
- Yes. Medicare's clinician data says Robert C. 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 Robert C. Williams?
- (707) 968-5442, as listed in official Medicare / NPI Registry data.
- What is Robert C. Williams's NPI number?
- 1336268077. 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 Robert C. Williams is enrolled with Medicare (CMS data updated 2026-10-02).
- 1000 Professional DrNapa, CA 94558 (707) 968‑5442
Specialties
- Oral Surgeryprimary
- Dentistalso
Other oral surgeons in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Clinician information
| Credential | DDS |
|---|---|
| Medical school | Loma Linda University School Of Dentistry |
| Graduation year | 1970 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1336268077 |
| 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