Ryan Williamson, DO
NPI 1356044093 · General Practice Physician · Fairfield, CA
Enrolled with Medicare as Order and Referring Only - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Ryan Williamson, DO is a General Practice Physician provider in Fairfield, CA (NPI 1356044093).
Provider details
- NPI number
- 1356044093
- Entity type
- Individual
- Primary specialty
- General Practice PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 02008118A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
3 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-03-22
- Last updated
- 2025-08-07
- Certified
- 2025-08-07
Frequently asked questions
- What is Ryan Williamson's NPI number?
- Ryan Williamson's National Provider Identifier (NPI) is 1356044093, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Ryan Williamson's specialty?
- Ryan Williamson is listed in the NPPES registry with a primary specialty of General Practice Physician (Allopathic & Osteopathic Physicians).
- Where is Ryan Williamson located?
- Ryan Williamson's practice location on file with NPPES is 101 Bodin Cir, Fairfield, CA 94535-1809.
- What is Ryan Williamson's phone number?
- The practice phone number listed in the NPPES registry for Ryan Williamson is (707) 423-3000.
- Does Ryan Williamson accept Medicare?
- Ryan Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Ryan Williamson's NPI active?
- Yes — Ryan Williamson's NPI (1356044093) is active in the NPPES registry as of the last update on 2025-08-07.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.