Margaret Chen
Family Medicine Physician · San Francisco, CA
Margaret Chen is a family medicine physician with a practice address in San Francisco, California, and NPI 1427403617, issued on Apr 26, 2016. Check the license (California A152850, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Margaret Chen
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A152850 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1001 Potrero Ave Bldg 80-83, San Francisco, CA 94110
- Phone
- (415) 206-5252
- Enumerated
- Apr 26, 2016
- Record last updated
- Mar 2, 2020 (not updated in 6 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20200122000562); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 1001 Potrero Ave Bldg 80-83
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Maria AcevedoStudent in an Organized Health Care Education/Training Program1548955248
- Nana-Adwoa Agyarkowah, MDStudent in an Organized Health Care Education/Training Program1285484691
- Norman ArcherStudent in an Organized Health Care Education/Training Program1124879176
- Lily BarnardFamily Medicine Physician1386272573
- Melissa CalicaStudent in an Organized Health Care Education/Training Program1922781574
- Mariam CarsonStudent in an Organized Health Care Education/Training Program1275472441
Verify Margaret Chen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A152850Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
75% fewer Medicare Part D claims than the average family medicine physician in 2024
883 Medicare Part D claims for 174 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. 17 claims were for opioids.
Most prescribed
- Atorvastatin Calcium76 claims
- Levothyroxine Sodium45 claims
- Amlodipine Besylate31 claims
- Albuterol Sulfate Hfa27 claims
- Alendronate Sodium25 claims
- Metformin Hcl24 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 2 group practices
- Ucsf Medical Group Business ServicesBerkeley, CA
- University OF California San FranciscoSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Margaret Chen among 17,133 family medicine physician records in California
Margaret Chen is one of 17,133 family medicine 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 2016, is newer than 76% of them.
- NPI issued2016 · 76% of these records are older, 21% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2016 · median 2005 among the 10,652 with a school on file
- Record last updated2020 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in San Francisco → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Joaquin Barahona, M. D.San Francisco, CA 941101205895133
- Luis Bonilla, MDSan Francisco, CA 941101629019708
- Christopher Bositis, MDSan Francisco, CA 941101427054493
- Romilda Foresti-Lorente, MDSan Francisco, CA 941101164455374
- Steven Lawton, MDSan Francisco, CA 941101366486748
- Todd May, MDSan Francisco, CA 941101679528335
- Pooja Mittal, DOSan Francisco, CA 941101215916200
- David Nidorf, MDSan Francisco, CA 941101336186121
Common questions
What is Margaret Chen's NPI number?
Margaret Chen's National Provider Identifier (NPI) is 1427403617, issued on Apr 26, 2016. An NPI identifies a provider in billing; it is not a license.
Where is Margaret Chen located?
The NPPES record lists a practice address at 1001 Potrero Ave Bldg 80-83, San Francisco, CA, 94110. Phone: (415) 206-5252. Providers update this record themselves, so call before visiting.
How can I verify Margaret Chen's license?
NPPES lists California license number A152850, 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 Margaret Chen prescribe under Medicare Part D?
In 2024, Margaret Chen had 883 Medicare Part D claims for 174 beneficiaries; the average among family medicine physician prescribers was 3,544. Part D covers Medicare prescriptions only.
What is Margaret Chen'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.