Brianna Noelle Williamson, MD
Psychiatry Physician · San Francisco, CA
Brianna Noelle Williamson, MD is a psychiatry physician with a practice address in San Francisco, California, and NPI 1306409537, issued on Apr 14, 2019. Check the license on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Brianna Noelle Williamson
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- R77394 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1825 4TH St, San Francisco, CA 94143
- Phone
- (415) 885-7671
- Enumerated
- Apr 14, 2019
- Record last updated
- Jan 23, 2025
- Fax
- (415) 353-9522
- Medicaid ID
- R77394 AZ
- Medicare enrollment
- Enrolled (PECOS I20250107004021); accepts Medicare assignment
- Medical or professional school
- Wright State University Boonshoft School Of Medicine, 2019
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 8,673 in California → Look up another NPI →
Also registered at 1825 4TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Brianna Noelle Williamson in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of CaliforniaCheck the board
- 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average psychiatry physician in 2024
11 Medicare Part D claims, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through 2 group practices
- Regents OF The University OF CaliforniaSan Francisco, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Brianna Noelle Williamson among 8,673 psychiatry physician records in California
Brianna Noelle Williamson, MD is one of 8,673 psychiatry physician records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 85% of them.
- NPI issued2019 · 85% of these records are older, 13% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2019 · median 2005 among the 3,295 with a school on file
- Record last updated2025 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
763 psychiatry physician records list a practice address in San Francisco
They are 763 of the 38,143 NPPES records with a practice address in San Francisco, and 8,673 psychiatry physician records in California.
All 8,673 in California → Every provider in San Francisco → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Amy Berlin, MDSan Francisco, CA 941431730131939
- Stuart Eisendrath, MDSan Francisco, CA 941431982656187
- Ellen Haller, MDSan Francisco, CA 941431891747119
- Mardi Horowitz, MDSan Francisco, CA 941431740234038
- Descartes Li, MDSan Francisco, CA 941431962454157
- Jonathan Lichtmacher, M.D.San Francisco, CA 941431891717203
- Sudha Prathikanti, MDSan Francisco, CA 941431245297084
- Victor Reus, MDSan Francisco, CA 941431154372449
Common questions
What is Brianna Noelle Williamson, MD's NPI number?
Brianna Noelle Williamson, MD's National Provider Identifier (NPI) is 1306409537, issued on Apr 14, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Brianna Noelle Williamson, MD located?
The NPPES record lists a practice address at 1825 4TH St, San Francisco, CA, 94143. Phone: (415) 885-7671. Providers update this record themselves, so call before visiting.
How can I verify Brianna Noelle Williamson, MD's license?
Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Brianna Noelle Williamson, MD prescribe under Medicare Part D?
In 2024, Brianna Noelle Williamson, MD had 11 Medicare Part D claims; the average among psychiatry physician prescribers was 1,000. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.