Chelsea Ma, MD
Dermatology Physician · Stanford, CA
Chelsea Ma, MD is a dermatology physician with a practice address in Stanford, California, and NPI 1871936575, issued on Apr 11, 2013. Check the license (California A145259, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Chelsea Ma
- Credential
- MD
- Primary taxonomy
- Dermatology Physician 207N00000X
- License numbers
- A145259 CA
264303 MA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Apr 11, 2013
- Record last updated
- Apr 16, 2024
- Medicare enrollment
- Enrolled (PECOS I20161024002715); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Chelsea Ma in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A145259Check 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% more Medicare Part D claims than the average dermatology physician in 2024
1,274 Medicare Part D claims for 394 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D.
Most prescribed
- Ketoconazole178 claims
- Clobetasol Propionate109 claims
- Triamcinolone Acetonide93 claims
- Hydrocortisone87 claims
- Fluocinonide78 claims
- Dupixent Pen71 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): 76.5 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).
Industry payments in 2024: $667.79
6 payments; by number, the most common kind was food and beverage; the largest payer was Amgen Inc. The 10,250 providers of this specialty with any payment received $8,544.61 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 affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Chelsea Ma among 2,083 dermatology physician records in California
Chelsea Ma, MD is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 72% of them.
- NPI issued2013 · 72% of these records are older, 25% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2015 · median 2006 among the 1,450 with a school on file
- Record last updated2024 · 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 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
59 dermatology physician records list a practice address in Stanford
They are 59 of the 5,606 NPPES records with a practice address in Stanford, and 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Stanford → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Joanna Badger, MDStanford, CA 943051881740678
- Howard Chang, MDStanford, CA 943051326061144
- David Fiorentino, MDStanford, CA 943051740335025
- Michelle Galant, M.D.Stanford, CA 943051225043938
- Paul Khavari, MDStanford, CA 943051780696252
- Youn-Hee Kim, MDStanford, CA 943051770619355
- Alfred Lane, MDStanford, CA 943051194879981
- Matt Marinkovich, MDStanford, CA 943051386734937
Common questions
What is Chelsea Ma, MD's NPI number?
Chelsea Ma, MD's National Provider Identifier (NPI) is 1871936575, issued on Apr 11, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Chelsea Ma, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Chelsea Ma, MD's license?
NPPES lists California license number A145259, 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 Chelsea Ma, MD prescribe under Medicare Part D?
In 2024, Chelsea Ma, MD had 1,274 Medicare Part D claims for 394 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
What is Chelsea Ma, MD's MIPS final score?
The 2023 MIPS final score is 76.5 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.