Mary Margaretten, MD
Rheumatology Physician · San Francisco, CA
Mary Margaretten, MD is a rheumatology physician with a practice address in San Francisco, California, and NPI 1588802706, issued on Jan 26, 2009. Check the license (California A90714, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Mary Margaretten
- Credential
- MD
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- A90714 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3333 California St, San Francisco, CA 94143
- Phone
- (415) 476-2965
- Enumerated
- Jan 26, 2009
- Entity
- Type 1 · individual
Also registered at 3333 California St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Emily AlexanderCounselor1801102421
- William Boyce, MDDevelopmental - Behavioral Pediatrics Physician1851732366
- Brian Davis, PHARMDPharmacist Clinician (PhC)/ Clinical Pharmacy Specialist1104089994
- Shannon EngelhartMental Health Counselor1427254259
- Katerina Fraim, MFTI, CRCMarriage & Family Therapist1740401207
- Olga GalvezCounselor1588859219
Verify Mary Margaretten in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A90714Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
60% fewer Medicare Part D claims than the average rheumatology physician in 2024
825 Medicare Part D claims for 94 beneficiaries, against an average of 2,058 among the 4,833 providers of this specialty who prescribed in Part D. Brand-name drugs were 44% of claims.
Most prescribed
- Humira Pen87 claims
- Rasuvo81 claims
- Methotrexate74 claims
- Prednisone73 claims
- Hydroxychloroquine Sulfate67 claims
- Humira(Cf) Pen35 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 Medicare quality score for 2023: 90.3 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).
One hospital or facility affiliation
- City And County OF San FranciscoSan 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.
Rheumatology Physician providers in California
There are 719 rheumatology physician records in California.
Other rheumatology physician records in California
- Thomas Abel, MDMonte Sereno, CA1871679399
- Thomas Adamson, M.D.San Diego, CA1639187057
- Sana Afroz, MDMoreno Valley, CA1356724074
- Atul Agrawal, MDAntioch, CA1528146016
- Bikramjit Ahluwalia, MDApple Valley, CA1669402467
- Shirin Ahmad, MDFolsom, CA1932182318
- Basma Al Nahlawi, M.D.San Marcos, CA1144455262
- Phillip Aleksiejuk, MDWoodland Hills, CA1063844579
- Stanley Alexander, MDArcadia, CA1497814685
- Edward Amento, M.D.Sunnyvale, CA1457896961
Common questions
What is Mary Margaretten, MD's NPI number?
Mary Margaretten, MD's National Provider Identifier (NPI) is 1588802706, issued on Jan 26, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Mary Margaretten, MD located?
The NPPES record lists a practice address at 3333 California St, San Francisco, CA, 94143. Phone: (415) 476-2965. Providers update this record themselves, so call before visiting.
How can I verify Mary Margaretten, MD's license?
NPPES lists California license number A90714, 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 Margaretten, MD prescribe under Medicare Part D?
In 2024, Mary Margaretten, MD had 825 Medicare Part D claims for 94 beneficiaries; the average among rheumatology physician prescribers was 2,058. Part D covers Medicare prescriptions only.
What is Mary Margaretten, MD's Medicare quality score?
The 2023 MIPS final score is 90.3 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), 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.