Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

John Carl Onderko, PAC

Individual provider Physician Assistant · NPI 1548231863

John Carl Onderko, PAC is a Physician Assistant in Johnstown, Pennsylvania. Qualified in 1979, 47 years ago. Accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
47
Licensed in
PA
In the registry since
2006
What do these letters mean?
PAC — Physician Assistant, Certified
A physician assistant holding current national certification; usually written PA-C.

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Practice location Address checks out

334 Bloomfield St Ste 205
Johnstown, PA 15904
Phone: (814) 266-8686
Fax: (814) 266-6478
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence MA000154L (PA)

Record details

NPI number1548231863
Entity typeIndividual (Type 1)
GenderMale
Credentials PAC
Sole proprietorNo
NPI enumeratedJanuary 27, 2006
Last updated in NPPESJuly 13, 2026
Mailing address334 Bloomfield St, Ste 205, Johnstown, PA 15904

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 1979 (47 years in practice)
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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