Brianna Williamson, MD
NPI 1306409537 · Psychiatry Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Hospice/Palliative Care · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brianna Williamson, MD is a Psychiatry Physician provider in San Francisco, CA (NPI 1306409537).
Provider details
- NPI number
- 1306409537
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- R77394 (AZ)
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
7 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
- 2019-04-14
- Last updated
- 2025-01-23
- Certified
- 2025-01-23
Frequently asked questions
- What is Brianna Williamson's NPI number?
- Brianna Williamson's National Provider Identifier (NPI) is 1306409537, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brianna Williamson's specialty?
- Brianna Williamson is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is Brianna Williamson located?
- Brianna Williamson's practice location on file with NPPES is 1825 4th St, San Francisco, CA 94143-2350.
- What is Brianna Williamson's phone number?
- The practice phone number listed in the NPPES registry for Brianna Williamson is (415) 885-7671.
- Does Brianna Williamson accept Medicare?
- Brianna Williamson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brianna Williamson's NPI active?
- Yes — Brianna Williamson's NPI (1306409537) is active in the NPPES registry as of the last update on 2025-01-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.