Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John Diab, PA
Physician Assistant in Orange, CA · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1164687570
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Registry record
Entity type Individual (Type 1)
Name John Diab
Credential PA
Sex Male
Practice address 867 S Tustin St, Orange, CA, 92866
Phone (714) 771-1420
Fax (714) 771-6918
Enumeration date Jul 24, 2008
Last updated in NPPES Apr 8, 2016
Taxonomy & licenses
363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA53252 (CA) Primary
PA · Physician Assistant: A licensed clinician who practices medicine in collaboration with physicians, trained in a graduate PA program.
About the PA credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What is the NPI number for John Diab?
The National Provider Identifier (NPI) for John Diab is 1164687570, a Type 1 (individual) record in the CMS NPPES registry.
Where does John Diab practice?
The practice location on file with NPPES is in Orange, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → William Nuesse Adult Medicine Physician · Orange, CA NPI 1952360729 Maryann Nuesse Adult Medicine Physician · Orange, CA NPI 1689633455 Kenneth Grubbs Family Medicine Physician · Orange, CA NPI 1588773295 William H Nuesse M D and Mary Ann Nuesse D O A Medical Corporation Clinic/Center · Orange, CA NPI 1508994088 Frank Young General Practice Physician · Orange, CA NPI 1447432620 Neil Chen Physician Assistant · Orange, CA NPI 1710615398 Simon Stephen Yao Family Nurse Practitioner · Orange, CA NPI 1275244774 Be Chiropractic PC Chiropractor · Orange, CA NPI 1205702560
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2016-04-08.