Efren P. Baria, DO
Pain Medicine (Anesthesiology) Physician · San Francisco, CA
Efren P. Baria, DO is a pain medicine (anesthesiology) physician with a practice address in San Francisco, California, and NPI 1609982115, issued on Aug 21, 2006. Check the license (California 20A9188, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Efren P. Baria
- Credential
- DO
- Primary taxonomy
- Pain Medicine (Anesthesiology) Physician 207LP2900X
- License number
- 20A9188 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3555 Cesar Chavez, San Francisco, CA 94110
- Phone
- (415) 641-6889
- Enumerated
- Aug 21, 2006
- Record last updated
- May 1, 2008 (not updated in 18 years: call before relying on the address or phone)
- Medicaid ID
- 00AX91880 CA
- Medicare enrollment
- Enrolled (PECOS I20060303000670); accepts Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 2001
- Entity
- Type 1 · individual
8 nearest pain medicine (anesthesiology) physician records → All 536 in California → Look up another NPI →
Also registered at 3555 Cesar Chavez
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jacob Aaron, MDInternal Medicine Physician1407202518
- Connie Amorde, P.A.-CPhysician Assistant1306884846
- Kamran AtabaiInternal Medicine Physician1992816680
- Enrique AyaldeCritical Care Medicine Nurse Practitioner1235696584
- Nader Banki, MDInternal Medicine Physician1518029792
- Gabriella Bartos, M.D.Internal Medicine Physician1881026672
Verify Efren P. Baria in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A9188Check 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
- Regents OF The University OF CaliforniaSan Francisco, CA
- University Anesthesia Medical GroupSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Efren P. Baria among 536 pain medicine (anesthesiology) physician records in California
Efren P. Baria, DO is one of 536 pain medicine (anesthesiology) physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 5% of them.
- NPI issued2006 · 5% of these records are older, 57% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2001 · median 2004 among the 367 with a school on file
- Record last updated2008 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207LP2900X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pain Medicine (Anesthesiology) Physician providers in California
There are 536 pain medicine (anesthesiology) physician records in California.
All 536 in California → Every provider in San Francisco → Pain Medicine (Anesthesiology) Physician nationwide →
The 8 pain medicine (anesthesiology) physician records with the nearest ZIP codes
- Adrian Bartoli, MD, MSSan Francisco, CA 941101154448256
- Kenneth Drasner, MDSan Francisco, CA 941101912965807
- Carlyle Hamsher, M.D.San Francisco, CA 941101619268893
- Samer Michaels, MDSan Francisco, CA 941101528176070
- Christopher Keys, MDSan Francisco, CA 941091568556462
- Aditi Saraswat, M.D.San Francisco, CA 941091952741233
- Chris Abrecht, M.D.San Francisco, CA 941151013283837
- Helen Chan, M.D.San Francisco, CA 941151760821987
Common questions
What is Efren P. Baria, DO's NPI number?
Efren P. Baria, DO's National Provider Identifier (NPI) is 1609982115, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Efren P. Baria, DO located?
The NPPES record lists a practice address at 3555 Cesar Chavez, San Francisco, CA, 94110. Phone: (415) 641-6889. Providers update this record themselves, so call before visiting.
How can I verify Efren P. Baria, DO's license?
NPPES lists California license number 20A9188, 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.