Jason Justin, PA-C
Physician Assistant · Mill Valley, CA
Jason Justin, PA-C is a physician assistant with a practice address in Mill Valley, California, and NPI 1265967079, issued on Apr 29, 2017. Check the license (California PA54845, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jason Justin
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA54845 CA
Self-reported in NPPES; status is on the state search - Practice location
- 750 Redwood Hwy Frontage RD Ste 1204, Mill Valley, CA 94941
- Phone
- (415) 384-4778
- Enumerated
- Apr 29, 2017
- Record last updated
- Sep 9, 2025
- Medicare enrollment
- Enrolled (PECOS I20180831002301); may accept Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 750 Redwood Hwy Frontage RD Ste 1204
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Jason Justin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA54845Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
82% fewer Medicare Part D claims than the average physician assistant in 2024
150 Medicare Part D claims for 69 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Gabapentin29 claims
- Meloxicam29 claims
- Oxycodone Hcl19 claims
- Famotidine17 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.
Bills Medicare through 3 group practices
- American Current Care OF California A Medical CorporationSanta Rosa, CA
- Regents Univ OF California UcsfSan Francisco, CA
- Ucsf Health Medical FoundationSan Francisco, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jason Justin among 14,451 physician assistant records in California
Jason Justin, 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 2017, is newer than 47% of them.
- NPI issued2017 · 47% of these records are older, 48% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 50% of these records are
- Graduated2017 · median 2018 among the 7,214 with a school on file
- Record last updated2025 · 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).
9 physician assistant records list a practice address in Mill Valley
They are 9 of the 653 NPPES records with a practice address in Mill Valley, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Mill Valley → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Ashley AguileraMill Valley, CA 949411679300206
- Aron Baum, PA-CMill Valley, CA 949411255851119
- Thomas Brookshire, P.A.Mill Valley, CA 949411720282684
- Colette Caldwell, PA-CMill Valley, CA 949411548084171
- Aaron Lanes, PA-C, MPH, MSPASMill Valley, CA 949411831406776
- Alexis Martinez, PA-CMill Valley, CA 949411073932034
- Diana Saylor, PA-CMill Valley, CA 949411497888614
- Tana Summers, PAMill Valley, CA 949411134240633
Common questions
What is Jason Justin, PA-C's NPI number?
Jason Justin, PA-C's National Provider Identifier (NPI) is 1265967079, issued on Apr 29, 2017. An NPI identifies a provider in billing; it is not a license.
Where is Jason Justin, PA-C located?
The NPPES record lists a practice address at 750 Redwood Hwy Frontage RD Ste 1204, Mill Valley, CA, 94941. Phone: (415) 384-4778. Providers update this record themselves, so call before visiting.
How can I verify Jason Justin, PA-C's license?
NPPES lists California license number PA54845, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does Jason Justin, PA-C prescribe under Medicare Part D?
In 2024, Jason Justin, PA-C had 150 Medicare Part D claims for 69 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
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.