John Diab, PA
Physician Assistant · Orange, CA
John Diab, PA is a physician assistant with a practice address in Orange, California, and NPI 1164687570, issued on Jul 24, 2008. Check the license (California PA53252, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Diab
- Credential
- PA
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- PA53252 CA
Self-reported in NPPES; status is on the state search - Practice location
- 867 S Tustin St, Orange, CA 92866
- Phone
- (714) 771-1420
- Enumerated
- Jul 24, 2008
- Record last updated
- Apr 8, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (714) 771-6918
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 14,451 in California → Look up another NPI →
Also registered at 867 S Tustin St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify John Diab in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license PA53252Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average physician assistant in 2024
17 Medicare Part D claims, against an average of 830 among the 101,058 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.
Industry payments in 2024: $21.41
1 payment: food and beverage; the largest payer was Pfizer Inc. The 64,719 providers of this specialty with any payment received $841.65 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.
John Diab among 14,451 physician assistant records in California
John Diab, 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 2008, is newer than 22% of them.
- NPI issued2008 · 22% of these records are older, 75% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2016 · 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).
181 physician assistant records list a practice address in Orange
They are 181 of the 13,245 NPPES records with a practice address in Orange, and 14,451 physician assistant records in California.
All 14,451 in California → Every provider in Orange → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Sarah AdamsOrange, CA 928661851101075
- Akeem Borom, PA-COrange, CA 928661316679822
- Andy Bui, PA-COrange, CA 928661508570250
- Neil ChenOrange, CA 928661710615398
- Julie Huynh, PA-COrange, CA 928661043728884
- Jenna KnappOrange, CA 928661528885449
- Aarti Kumari, PHYSICIAN ASSISTANTOrange, CA 928661578108908
- Sara Morton, PA-COrange, CA 928661356569271
Common questions
What is John Diab, PA's NPI number?
John Diab, PA's National Provider Identifier (NPI) is 1164687570, issued on Jul 24, 2008. An NPI identifies a provider in billing; it is not a license.
Where is John Diab, PA located?
The NPPES record lists a practice address at 867 S Tustin St, Orange, CA, 92866. Phone: (714) 771-1420. Providers update this record themselves, so call before visiting.
How can I verify John Diab, PA's license?
NPPES lists California license number PA53252, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Diab, PA prescribe under Medicare Part D?
In 2024, John Diab, PA had 17 Medicare Part D claims; 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.