John Nastasi
Surgical Physician Assistant · Fullerton, CA
John Nastasi is a surgical physician assistant with a practice address in Fullerton, California, and NPI 1487117594, issued on Apr 8, 2019. Check the license (California 56355, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Nastasi
- Primary taxonomy
- Surgical Physician Assistant 363AS0400X
- License number
- 56355 CA
Self-reported in NPPES; status is on the state search - Practice location
- 100 W Valencia Mesa Dr # 211, Fullerton, CA 92835
- Phone
- (714) 778-1032
- Enumerated
- Apr 8, 2019
- Record last updated
- Dec 1, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190618003254); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest surgical physician assistant records → All 1,075 in California → Look up another NPI →
Verify John Nastasi in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 56355Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average surgical physician assistant in 2024
28 Medicare Part D claims for 16 beneficiaries, against an average of 304 among the 10,174 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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 one group practice
- Southern California Permanente Medical GroupHarbor City, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Nastasi among 1,075 surgical physician assistant records in California
John Nastasi is one of 1,075 surgical physician assistant records with a practice address in California. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 80% of them.
- NPI issued2019 · 80% of these records are older, 16% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2018 · median 2012 among the 649 with a school on file
- Record last updated2021 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AS0400X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgical Physician Assistant providers in California
There are 1,075 surgical physician assistant records in California.
All 1,075 in California → Every provider in Fullerton → Surgical Physician Assistant nationwide →
The 8 surgical physician assistant records with the nearest ZIP codes
- Zulhumar Adil, PA-CFullerton, CA 928351578328043
- May Ali, PA-CFullerton, CA 928351952589459
- Dennis Briley, PAFullerton, CA 928351174731640
- Carrie Carrillo, PAFullerton, CA 928351588872089
- Carrie-Anne Clark, PA-CFullerton, CA 928351275742462
- Jason Cook, M.S., PA-CFullerton, CA 928351831227610
- Charles Greener, PAFullerton, CA 928351346716842
- William Hall, PA-CFullerton, CA 928351205889326
Common questions
What is John Nastasi's NPI number?
John Nastasi's National Provider Identifier (NPI) is 1487117594, issued on Apr 8, 2019. An NPI identifies a provider in billing; it is not a license.
Where is John Nastasi located?
The NPPES record lists a practice address at 100 W Valencia Mesa Dr # 211, Fullerton, CA, 92835. Phone: (714) 778-1032. Providers update this record themselves, so call before visiting.
How can I verify John Nastasi's license?
NPPES lists California license number 56355, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Nastasi prescribe under Medicare Part D?
In 2024, John Nastasi had 28 Medicare Part D claims for 16 beneficiaries; the average among surgical physician assistant prescribers was 304. 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.