John Carl Onderko, PAC
Physician Assistant · Johnstown, PA
John Carl Onderko, PAC is a physician assistant with a practice address in Johnstown, Pennsylvania, and NPI 1548231863, issued on Jan 27, 2006. Check the license (Pennsylvania MA000154L, as entered in NPPES) with the Pennsylvania board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Carl Onderko
- Credential
- PAC
- Primary taxonomy
- Physician Assistant 363A00000X
- License number
- MA000154L PA
Self-reported in NPPES; status is on the state search - Practice location
- 334 Bloomfield St, Johnstown, PA 15904
- Phone
- (814) 266-8686
- Enumerated
- Jan 27, 2006
- Record last updated
- Jul 13, 2026
- Fax
- (814) 266-6478
- Medicare enrollment
- Enrolled (PECOS I20060103000422); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 8,020 in Pennsylvania → Look up another NPI →
Also registered at 334 Bloomfield St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Charles Stotler, MDFamily Medicine Physician1114998333
Verify John Carl Onderko in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Pennsylvania board licenses this profession
Search for license MA000154LCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4.7 times the Medicare Part D claims of the average physician assistant in 2024
3,871 Medicare Part D claims for 526 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims.
Most prescribed
- Atorvastatin Calcium212 claims
- Amlodipine Besylate170 claims
- Pantoprazole Sodium167 claims
- Rosuvastatin Calcium138 claims
- Lisinopril135 claims
- Metformin Hcl132 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: $279.55
3 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. 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 Carl Onderko among 8,020 physician assistant records in Pennsylvania
John Carl Onderko, PAC is one of 8,020 physician assistant records with a practice address in Pennsylvania. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 3% of them.
- NPI issued2006 · 3% of these records are older, 85% newer
- In a Medicare fileYes · 80% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated1979 · median 2018 among the 5,313 with a school on file
- Record last updated2026 · 42% 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 Pennsylvania practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
70 physician assistant records list a practice address in Johnstown
They are 70 of the 1,724 NPPES records with a practice address in Johnstown, and 8,020 physician assistant records in Pennsylvania.
All 8,020 in Pennsylvania → Every provider in Johnstown → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Taylor Flick, PACJohnstown, PA 159041598292740
- Kevin Green, P.AJohnstown, PA 159041053521302
- Josie Helsel, PA-CJohnstown, PA 159041033695929
- Jordan Koontz, PA-CJohnstown, PA 159041255824686
- Melissa Leonardis, PAJohnstown, PA 159041396716601
- Erin Martella, PA-CJohnstown, PA 159041063645034
- Taylor McBreen, PHYSICIAN ASSISTANTJohnstown, PA 159041528544418
- Mark McConnell, PACJohnstown, PA 159041538239272
Common questions
What is John Carl Onderko, PAC's NPI number?
John Carl Onderko, PAC's National Provider Identifier (NPI) is 1548231863, issued on Jan 27, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Carl Onderko, PAC located?
The NPPES record lists a practice address at 334 Bloomfield St, Johnstown, PA, 15904. Phone: (814) 266-8686. Providers update this record themselves, so call before visiting.
How can I verify John Carl Onderko, PAC's license?
NPPES lists Pennsylvania license number MA000154L, as entered by the provider. Search the Pennsylvania board that licenses this profession; the NPPES record confirms identity only.
How much does John Carl Onderko, PAC prescribe under Medicare Part D?
In 2024, John Carl Onderko, PAC had 3,871 Medicare Part D claims for 526 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.