Edward K. Onuma, M.D.,PHD
Specialist · San Mateo, CA
Edward K. Onuma, M.D.,PHD is a specialist with a practice address in San Mateo, California, and NPI 1477559722, issued on Jun 22, 2005. Check the license (California 00G855080, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Edward K. Onuma
- Credential
- M.D.,PHD
- Primary taxonomy
- Specialist 174400000X
- License number
- 00G855080 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 South Ellsworth Avenue, San Mateo, CA 94401
- Phone
- (650) 342-7432
- Enumerated
- Jun 22, 2005
- Record last updated
- Feb 21, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (650) 342-3239
- Medicare enrollment
- Enrolled (PECOS I20110215000946); accepts Medicare assignment
- Medical or professional school
- State University Of Ny Upstate Medical University, 1990
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest specialist records → All 5,749 in California → Look up another NPI →
Also registered at 100 South Ellsworth Avenue
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Hughes, MDSports Medicine (Orthopaedic Surgery) Physician1851361695
- Eugene Lee, MDSpecialist1023049590
Verify Edward K. Onuma in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 00G855080Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
8% fewer Medicare Part D claims than the average specialist in 2024
1,266 Medicare Part D claims for 488 beneficiaries, against an average of 1,380 among the 8,233 providers of this specialty who prescribed in Part D. Brand-name drugs were 14% of claims.
Most prescribed
- Pantoprazole Sodium306 claims
- Sod Sulf-Potass Sulf-Mag Sulf246 claims
- Omeprazole163 claims
- Famotidine128 claims
- Sucralfate61 claims
- Mesalamine37 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 90.9 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $159.83
3 payments; by number, the most common kind was food and beverage; the largest payer was Madrigal Pharmaceuticals. The 5,844 providers of this specialty with any payment received $4,760.79 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 one group practice
- Peninsula GastrointestinalSan Mateo, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Edward K. Onuma among 5,749 specialist records in California
Edward K. Onuma, M.D.,PHD is one of 5,749 specialist records with a practice address in California. 30% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 93% newer
- In a Medicare fileYes · 30% of these records are
- In the CMS Doctors and Clinicians fileYes · 19% of these records are
- Graduated1990 · median 1989 among the 1,075 with a school on file
- Record last updated2008 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 174400000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Specialist providers in California
There are 5,749 specialist records in California.
All 5,749 in California → Every provider in San Mateo → Specialist nationwide →
The 8 specialist records with the nearest ZIP codes
- Marieta Angtuaco, M.D.San Mateo, CA 944011548324536
- Howard Cohen, M.D.San Mateo, CA 944011265448740
- Paul Hazelrig, M.D.San Mateo, CA 944011477568061
- Stephen Hurst, M.D.San Mateo, CA 944011689680142
- Sharryn Jones, MSPT, CSCSSan Mateo, CA 944011225252075
- Eugene Lee, MDSan Mateo, CA 944011023049590
- Dennis Park, M.D.San Mateo, CA 944011881600328
- Walter Pyka, M.D.San Mateo, CA 944011871509372
Common questions
What is Edward K. Onuma, M.D.,PHD's NPI number?
Edward K. Onuma, M.D.,PHD's National Provider Identifier (NPI) is 1477559722, issued on Jun 22, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Edward K. Onuma, M.D.,PHD located?
The NPPES record lists a practice address at 100 South Ellsworth Avenue, San Mateo, CA, 94401. Phone: (650) 342-7432. Providers update this record themselves, so call before visiting.
How can I verify Edward K. Onuma, M.D.,PHD's license?
NPPES lists California license number 00G855080, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Edward K. Onuma, M.D.,PHD prescribe under Medicare Part D?
In 2024, Edward K. Onuma, M.D.,PHD had 1,266 Medicare Part D claims for 488 beneficiaries; the average among specialist prescribers was 1,380. Part D covers Medicare prescriptions only.
What is Edward K. Onuma, M.D.,PHD's MIPS final score?
The 2023 MIPS final score is 90.9 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.