Seiji Yamaguchi, M.D.
Surgery Physician · San Francisco, CA
Seiji Yamaguchi, M.D. is a surgery physician with a practice address in San Francisco, California, and NPI 1932543030, issued on Apr 20, 2013. Check the license (California A154172, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Seiji Yamaguchi
- Credential
- M.D.
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- A154172 CA
Self-reported in NPPES; status is on the state search - Practice location
- 505 Parnassus Ave # M-896, San Francisco, CA 94143
- Phone
- (415) 608-4051
- Enumerated
- Apr 20, 2013
- Record last updated
- May 7, 2026
- Medicare enrollment
- Enrolled (PECOS I20180912002270); accepts Medicare assignment
- Medical or professional school
- Georgetown University School Of Medicine, 2013
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
Also registered at 505 Parnassus Ave # M-896
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Stefany BarrigaAcute Care Nurse Practitioner1518615277
Verify Seiji Yamaguchi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A154172Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average surgery physician in 2024
139 Medicare Part D claims for 30 beneficiaries, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Sulfamethoxazole-Trimethoprim22 claims
- Omeprazole13 claims
- Valganciclovir Hcl11 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.
Industry payments in 2024: $26.19
1 payment: food and beverage; the largest payer was Integra LifeSciences Corporation. The 17,103 providers of this specialty with any payment received $3,513.80 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.
Bills Medicare through 2 group practices
- Ucsf Dept OF SurgerySan Francisco, CA
- Ucsf Medical Group Business ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
Other surgery physician records in California
- Miriam Abaunza, M.D.Los Angeles, CA1538470778
- Hana Abdirahman, MDTemecula, CA1265288112
- Sherwin Abdoli, MDPetaluma, CA1508386442
- Mhdshafic Abdulkarim, MDOrange, CA1750174249
- Sarah Abdulla, M.D.Baldwin Park, CA1699200840
- Shoko Abe, M.D.Berkeley, CA1609178136
- Stuart Abel, M.D.Los Angeles, CA1750761516
- Elliot Abemayor, MDLos Angeles, CA1972527414
- Marc Abi Karam, MD, MSPalo Alto, CA1437846508
- Ali Abidali, DOGlendora, CA1861888794
Common questions
What is Seiji Yamaguchi, M.D.'s NPI number?
Seiji Yamaguchi, M.D.'s National Provider Identifier (NPI) is 1932543030, issued on Apr 20, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Seiji Yamaguchi, M.D. located?
The NPPES record lists a practice address at 505 Parnassus Ave # M-896, San Francisco, CA, 94143. Phone: (415) 608-4051. Providers update this record themselves, so call before visiting.
How can I verify Seiji Yamaguchi, M.D.'s license?
NPPES lists California license number A154172, 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 Seiji Yamaguchi, M.D. prescribe under Medicare Part D?
In 2024, Seiji Yamaguchi, M.D. had 139 Medicare Part D claims for 30 beneficiaries; the average among surgery physician prescribers was 147. 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.