Mackenzie Jassowski, PA-C
Physician Assistant · San Francisco, CA
Mackenzie Jassowski, PA-C is a physician assistant with a practice address in San Francisco, California, and NPI 1689261620, issued on Dec 23, 2020. Check the license (California 59681, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Mackenzie Jassowski
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- 59681 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3838 California St RM 715, San Francisco, CA 94118
- Phone
- (415) 592-2091
- Enumerated
- Dec 23, 2020
- Record last updated
- Dec 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (415) 752-2560
- Medicare enrollment
- Enrolled (PECOS I20210923001768); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 3838 California St RM 715
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Keith Chan, M.D.Sports Medicine (Orthopaedic Surgery) Physician1548452782
- Kanwaljit Gill, MDOrthopaedic Surgery Physician1679658348
- Virginia Hoptman, PA-CSurgical Physician Assistant1811531023
Verify Mackenzie Jassowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 59681Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
47% fewer Medicare Part D claims than the average physician assistant in 2024
437 Medicare Part D claims for 251 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 242 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen152 claims
- Ondansetron Hcl144 claims
- Oxycodone-Acetaminophen60 claims
- Tramadol Hcl22 claims
- Gabapentin14 claims
- Cephalexin12 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).
Bills Medicare through 2 group practices
- California Pacific Orthopaedics And Sports Medicine A Medical CorporatSan Francisco, CA
- Regents OF The University OF California - UcsfSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mackenzie Jassowski among 14,451 physician assistant records in California
Mackenzie Jassowski, PA-C 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 2020, is newer than 62% of them.
- NPI issued2020 · 62% of these records are older, 33% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2021 · median 2018 among the 7,214 with a school on file
- Record last updated2021 · 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
- Veronika Archer, PA-CSan Francisco, CA 941181659424190
- Gloria Cheng, PASan Francisco, CA 941181548662109
- Richard Dibella, PASan Francisco, CA 941181134169410
- Eric Dyer, PA-CSan Francisco, CA 941181316289192
- Linda Gourley, PH.D., PA-CSan Francisco, CA 941181558584912
- Pamela Ibanez, PA-CSan Francisco, CA 941181225408768
- Ellen Liao, PA-CSan Francisco, CA 941181417129156
- Sarah Makin, MPAS, PA-CSan Francisco, CA 941181629596481
Common questions
What is Mackenzie Jassowski, PA-C's NPI number?
Mackenzie Jassowski, PA-C's National Provider Identifier (NPI) is 1689261620, issued on Dec 23, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Mackenzie Jassowski, PA-C located?
The NPPES record lists a practice address at 3838 California St RM 715, San Francisco, CA, 94118. Phone: (415) 592-2091. Providers update this record themselves, so call before visiting.
How can I verify Mackenzie Jassowski, PA-C's license?
NPPES lists California license number 59681, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Mackenzie Jassowski, PA-C prescribe under Medicare Part D?
In 2024, Mackenzie Jassowski, PA-C had 437 Medicare Part D claims for 251 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Mackenzie Jassowski, PA-C'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.