Karen P. Tuan, M.D.
Obstetrics & Gynecology Physician · San Francisco, CA
Karen P. Tuan, M.D. is an obstetrics & gynecology physician with a practice address in San Francisco, California, and NPI 1669441358, issued on Mar 15, 2006. Check the license (California G80796, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen P. Tuan
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- G80796 CA
Self-reported in NPPES; status is on the state search - Practice location
- 929 Clay St, San Francisco, CA 94108
- Phone
- (415) 398-7178
- Enumerated
- Mar 15, 2006
- Record last updated
- Aug 2, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (415) 398-5525
- Medicare enrollment
- Enrolled (PECOS I20101120000076); accepts Medicare assignment
- Medical or professional school
- Boston University School Of Medicine, 1990
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 929 Clay St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Raymond Fay, MDUrology Physician1003808338
- Gustin Ho, M.D.Internal Medicine Physician1437189966
- Wenwu Jin, M.D., PH.D.Urology Physician1003051780
Verify Karen P. Tuan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G80796Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average obstetrics & gynecology physician in 2024
533 Medicare Part D claims for 289 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of claims.
Most prescribed
- Estradiol311 claims
- Terconazole74 claims
- Premarin68 claims
- Ciprofloxacin Hcl56 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.
Karen P. Tuan among 5,088 obstetrics & gynecology physician records in California
Karen P. Tuan, M.D. is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% 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, 52% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated1990 · median 2004 among the 2,700 with a school on file
- Record last updated2010 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in San Francisco → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Wing Lee, MDSan Francisco, CA 941081396730149
- Eric Tabas, M.D.San Francisco, CA 941081194744722
- Ke Tuan, M.D.San Francisco, CA 941081104873520
- Anna Buchsbaum, M.D.San Francisco, CA 941091689806317
- Izumi Cabrera, M.D.San Francisco, CA 941091346430584
- Karen Chu, MDSan Francisco, CA 941091053436899
- Jason Dimsdale, MDSan Francisco, CA 941091457333973
- Geraldine EkpoSan Francisco, CA 941091356503643
Common questions
What is Karen P. Tuan, M.D.'s NPI number?
Karen P. Tuan, M.D.'s National Provider Identifier (NPI) is 1669441358, issued on Mar 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Karen P. Tuan, M.D. located?
The NPPES record lists a practice address at 929 Clay St, San Francisco, CA, 94108. Phone: (415) 398-7178. Providers update this record themselves, so call before visiting.
How can I verify Karen P. Tuan, M.D.'s license?
NPPES lists California license number G80796, 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.
How much does Karen P. Tuan, M.D. prescribe under Medicare Part D?
In 2024, Karen P. Tuan, M.D. had 533 Medicare Part D claims for 289 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.