Megan Elizabeth O'Brien, MD
Psychiatry Physician · San Francisco, CA
Megan Elizabeth O'Brien, MD is a psychiatry physician with a practice address in San Francisco, California, and NPI 1861029183, issued on Mar 25, 2020. Check the license (California 178997, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Megan Elizabeth O'Brien
- Credential
- MD
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 178997 CA
Self-reported in NPPES; status is on the state search - Practice location
- 675 18TH St, San Francisco, CA 94143
- Phone
- (415) 476-7000
- Enumerated
- Mar 25, 2020
- Record last updated
- Oct 2, 2025
- Fax
- (415) 476-7320
- Medicare enrollment
- Enrolled (PECOS I20240617003708); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2020
- 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 675 18TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Zachary Bonzell, MDPsychiatry Physician1669111720
- Micah BreigerPsychiatry Physician1417759721
- Anika Carter, LMSWClinical Social Worker1215401195
Verify Megan Elizabeth O'Brien in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 178997Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through 2 group practices
- Ucsf Medical Group Business ServicesBerkeley, 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).
Megan Elizabeth O'Brien among 8,673 psychiatry physician records in California
Megan Elizabeth O'Brien, 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 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 9% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileYes · 38% of these records are
- Graduated2020 · 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 Megan Elizabeth O'Brien, MD's NPI number?
Megan Elizabeth O'Brien, MD's National Provider Identifier (NPI) is 1861029183, issued on Mar 25, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Megan Elizabeth O'Brien, MD located?
The NPPES record lists a practice address at 675 18TH St, San Francisco, CA, 94143. Phone: (415) 476-7000. Providers update this record themselves, so call before visiting.
How can I verify Megan Elizabeth O'Brien, MD's license?
NPPES lists California license number 178997, as entered by the provider. 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.
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.