Maxx A. Kumiski, PA
Physician Assistant · San Francisco, CA
Maxx A. Kumiski, PA is a physician assistant with a practice address in San Francisco, California, and NPI 1952800203, issued on Feb 1, 2018. Check the license (California 57698, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Maxx A. Kumiski
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- 57698 CA
4082 CT
Self-reported in NPPES; status is on the state search - Practice location
- 1600 Market St, San Francisco, CA 94102
- Phone
- (415) 746-1812
- Enumerated
- Feb 1, 2018
- Record last updated
- Feb 13, 2020 (not updated in 6 years: call before relying on the address or phone)
- Fax
- (415) 829-2326
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 1600 Market St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Maxx A. Kumiski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 57698Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
71% fewer Medicare Part D claims than the average physician assistant in 2024
239 Medicare Part D claims for 135 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 14 claims were for opioids.
Most prescribed
- Ibuprofen61 claims
- Cyclobenzaprine Hcl28 claims
- Diazepam18 claims
- Albuterol Sulfate Hfa15 claims
- Cephalexin13 claims
- Hydrocodone-Acetaminophen12 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): 100 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).
Maxx A. Kumiski among 14,451 physician assistant records in California
Maxx A. Kumiski, PA is one of 14,451 physician assistant records with a practice address in California. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 52% of them.
- NPI issued2018 · 52% of these records are older, 44% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2020 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physician Assistant providers in California
There are 14,451 physician assistant records in California.
All 14,451 in California → Every provider in San Francisco → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
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- Morgan CavanaughSan Francisco, CA 941021932960986
- Kathy ChenSan Francisco, CA 941021871255927
- Kacie Cooke, PASan Francisco, CA 941021487949707
- Michele Etzbach, PA-CSan Francisco, CA 941021588471460
- Charis Fasoldt, PASan Francisco, CA 941021447943667
- James Franicevich, NPSan Francisco, CA 941021205953676
- Melissa Heyer, PA-CSan Francisco, CA 941021043555170
Common questions
What is Maxx A. Kumiski, PA's NPI number?
Maxx A. Kumiski, PA's National Provider Identifier (NPI) is 1952800203, issued on Feb 1, 2018. An NPI identifies a provider in billing; it is not a license.
Where is Maxx A. Kumiski, PA located?
The NPPES record lists a practice address at 1600 Market St, San Francisco, CA, 94102. Phone: (415) 746-1812. Providers update this record themselves, so call before visiting.
How can I verify Maxx A. Kumiski, PA's license?
NPPES lists California license number 57698, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Maxx A. Kumiski, PA prescribe under Medicare Part D?
In 2024, Maxx A. Kumiski, PA had 239 Medicare Part D claims for 135 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Maxx A. Kumiski, PA's MIPS final score?
The 2023 MIPS final score is 100 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.