Margaret Chen, MD
Obstetrics & Gynecology Physician · San Francisco, CA
Margaret Chen, MD is an obstetrics & gynecology physician with a practice address in San Francisco, California, and NPI 1578619706, issued on Jan 29, 2007. Check the license (California G42306, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Margaret Chen
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G42306 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3625 California St, San Francisco, CA 94118
- Phone
- (415) 668-1010
- Enumerated
- Jan 29, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (415) 668-7465
- Entity
- Type 1 · individual
Also registered at 3625 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Cynthia Farner, MDObstetrics & Gynecology Physician1902942949
- John Fassett, RNP/CNMAdvanced Practice Midwife1619252509
- Jordan Horowitz, MDObstetrics & Gynecology Physician1942356175
Verify Margaret Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G42306Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $15.94
1 payment: food and beverage; the largest payer was Sanofi Pasteur Inc. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
Other obstetrics & gynecology physician records in California
- Ingrid Aalami, MDSan Jose, CA1952376550
- Avisa Abaian- Eagar, M.D.Orange, CA1316057755
- Derek Abbassi, MDWalnut Creek, CA1841364155
- Ahmed Abdelaziz, MDSanta Maria, CA1790039733
- Alireza Abdollah Shamshirsaz, M.D.Palo Alto, CA1881804235
- Nicole Abell, DOVentura, CA1811243603
- Zachary AbelsonLos Angeles, CA1689237414
- Ray Abinader, M.D.Loma Linda, CA1770901548
- Tarek Abou El Kheir, M.D.San Bernardino, CA1477521789
- Nada Abou-HaibaLos Angeles, CA1134067549
Common questions
What is Margaret Chen, MD's NPI number?
Margaret Chen, MD's National Provider Identifier (NPI) is 1578619706, issued on Jan 29, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Chen, MD located?
The NPPES record lists a practice address at 3625 California St, San Francisco, CA, 94118. Phone: (415) 668-1010. Providers update this record themselves, so call before visiting.
How can I verify Margaret Chen, MD's license?
NPPES lists California license number G42306, 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.