Mary Nakamura, M.D.
Rheumatology Physician · San Francisco, CA
Mary Nakamura, M.D. is a rheumatology physician with a practice address in San Francisco, California, and NPI 1861508848, issued on Aug 22, 2006. Check the license (California G063340, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Nakamura
- Credential
- M.D.
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- G063340 CA
Self-reported in NPPES; status is on the state search - Practice location
- 4150 Clement St, San Francisco, CA 94121
- Phone
- (415) 750-2104
- Enumerated
- Aug 22, 2006
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20170202001442); accepts Medicare assignment
- Medical or professional school
- Yale University School Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 4150 Clement St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Gary Abrams, M.D.Physical Medicine & Rehabilitation Physician1346213246
- Anna Abramson, M.D.Internal Medicine Physician1346424785
- Alison Acerra, MS, RDRegistered Dietitian1992726848
- Sharon AdelsonCounselor1932467271
- Gary Agcaoili, C.T.R.SRecreation Therapist1649284019
Verify Mary Nakamura in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G063340Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average rheumatology physician in 2024
863 Medicare Part D claims for 79 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D.
Most prescribed
- Prednisone199 claims
- Methotrexate82 claims
- Enbrel56 claims
- Enbrel Sureclick45 claims
- Alendronate Sodium40 claims
- Actemra Actpen38 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): 74.5 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).
Bills Medicare through one group practice
- 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).
Mary Nakamura among 926 rheumatology physician records in California
Mary Nakamura, M.D. is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1986 · median 2003 among the 641 with a school on file
- Record last updated2007 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in San Francisco → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Celia Lin, M.D.San Francisco, CA 941211932393162
- Gabriela Schmajuk, M.D.San Francisco, CA 941211144416892
- William Seaman, M,D,San Francisco, CA 941211679689418
- Barbara Finck, M.D.San Francisco, CA 941181538307657
- Joseph Azzam, MDSan Francisco, CA 941171679078109
- Raymond Malamet, MDSan Francisco, CA 941161760488415
- Brenda Spriggs, M.D.San Francisco, CA 941161720323355
- Ishita Aggarwal, MDSan Francisco, CA 941151518385699
Common questions
What is Mary Nakamura, M.D.'s NPI number?
Mary Nakamura, M.D.'s National Provider Identifier (NPI) is 1861508848, issued on Aug 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Nakamura, M.D. located?
The NPPES record lists a practice address at 4150 Clement St, San Francisco, CA, 94121. Phone: (415) 750-2104. Providers update this record themselves, so call before visiting.
How can I verify Mary Nakamura, M.D.'s license?
NPPES lists California license number G063340, 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 Mary Nakamura, M.D. prescribe under Medicare Part D?
In 2024, Mary Nakamura, M.D. had 863 Medicare Part D claims for 79 beneficiaries; the average among rheumatology physician prescribers was 1,978. Part D covers Medicare prescriptions only.
What is Mary Nakamura, M.D.'s MIPS final score?
The 2023 MIPS final score is 74.5 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.