John Umekubo, MD
Internal Medicine Physician · San Francisco, CA
John Umekubo, MD is an internal medicine physician with a practice address in San Francisco, California, and NPI 1093823858, issued on Aug 29, 2006. Check the license (California G37604, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Umekubo
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G37604 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1674 Post St, San Francisco, CA 94115
- Phone
- (415) 931-5182
- Enumerated
- Aug 29, 2006
- Entity
- Type 1 · individual
Verify John Umekubo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G37604Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
31% fewer Medicare Part D claims than the average internal medicine physician in 2024
1,925 Medicare Part D claims for 156 beneficiaries, against an average of 2,785 among the 127,794 providers of this specialty who prescribed in Part D. 76 claims were for opioids.
Most prescribed
- Amlodipine Besylate134 claims
- Valsartan84 claims
- Atorvastatin Calcium76 claims
- Metformin Hcl71 claims
- Simvastatin60 claims
- Losartan Potassium58 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 Medicare quality score for 2023: 96.5 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,422.95
12 payments, mostly food and beverage; the largest payer was Genzyme Corporation. The 65,274 providers of this specialty with any payment received $2,536.66 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.
One hospital or facility affiliation
- Ucsf Medical Group Business ServicesSan Francisco, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
1,593 internal medicine physician records list a San Francisco practice address
They are 1,593 of the 38,143 NPPES records with a San Francisco practice address, and 20,403 internal medicine physician records in California.
All 1,593 in San Francisco → All 20,403 in California → Every provider in San Francisco →
Other internal medicine physician records in California
- Jacob Aaron, MDSan Francisco, CA1407202518
- Alistair Aaronson, MDStanford, CA1457628760
- Jose Abad., MDSacramento, CA1144607219
- Donna Abare, MDOakland, CA1386722155
- Marce AbareScotts Valley, CA1457744708
- Samuel Abarte, M.D.Chula Vista, CA1578535498
- Alexander Abary, MDLong Beach, CA1104995919
- Luba Abascal, MDSan Francisco, CA1023180874
- Michael Abate, MDSacramento, CA1548248131
- Wali Abawi, D.O.Joshua Tree, CA1104362268
Common questions
What is John Umekubo, MD's NPI number?
John Umekubo, MD's National Provider Identifier (NPI) is 1093823858, issued on Aug 29, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Umekubo, MD located?
The NPPES record lists a practice address at 1674 Post St, San Francisco, CA, 94115. Phone: (415) 931-5182. Providers update this record themselves, so call before visiting.
How can I verify John Umekubo, MD's license?
NPPES lists California license number G37604, 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 John Umekubo, MD prescribe under Medicare Part D?
In 2024, John Umekubo, MD had 1,925 Medicare Part D claims for 156 beneficiaries; the average among internal medicine physician prescribers was 2,785. Part D covers Medicare prescriptions only.
What is John Umekubo, MD's Medicare quality score?
The 2023 MIPS final score is 96.5 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.