Active NPI 1548231863 Individual Practitioner Male Practitioner

John Carl Onderko , PA-C

Physician Assistant • Johnstown, PA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

John Onderko, PA-C is a certified Physician Assistant practicing in Johnstown, PA. With approximately 47 years of clinical experience since completing medical education in 1979, John Onderko delivers high-quality medical care to the local community at 334 BLOOMFIELD ST.

John Onderko accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, annual alcohol misuse screening, 5 to, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

334 Bloomfield St
Ste 205

Johnstown, PA 15904

Telephone 8142668686

Fax 8142666478

Associated Practice Facility / Clinic

🏢 Footsteps Psychological Services Facility NPI 1023074192

Medicare Profile & Education

Medical School

Other

Graduation Year

1979

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Johnstown, PA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

47 Yrs +31.1 yrs vs City Avg

City Avg: 15.9 Yrs

State Avg: 11.5 Yrs

Regional Practice Density

70 Specialists

Practicing in Johnstown, PA (8068 Statewide)

Telehealth Adoption Rate

4.3% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

26.7% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Onderko (47 Years) 47 Yrs

Johnstown Specialty Average (15.9 Years) 15.9 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	56	33	$100.18	$73.26
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	20	15	$62.00	$45.27
G0442 Annual alcohol misuse screening, 5 to 15 minutes	14	14	$20.00	$15.00

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	50	31	$98.76	$74.48
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	21	15	$61.81	$46.46
G0442 Annual alcohol misuse screening, 5 to 15 minutes	18	18	$20.00	$15.13
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	16	16	$250.00	$106.88
G0444 Annual depression screening, 5 to 15 minutes	14	14	$20.00	$15.13

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	51	36	$98.00	$75.69
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	22	15	$60.00	$47.06
G0442 Annual alcohol misuse screening, 5 to 15 minutes	19	19	$20.00	$15.53
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	17	17	$250.00	$109.35
G0444 Annual depression screening, 5 to 15 minutes	17	17	$20.00	$15.24

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	70	46	$96.20	$76.66
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	45	29	$59.33	$47.05
G0444 Annual depression screening, 5 to 15 minutes	29	29	$20.00	$15.59
G0442 Annual alcohol misuse screening, 5 to 15 minutes	23	23	$20.00	$15.59
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	22	22	$250.00	$111.69

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	71	39	$57.00	$37.65
99213 Established patient office or other outpatient visit, typically 15 minutes	48	35	$90.00	$62.55

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	90	55	$56.87	$37.12
99213 Established patient office or other outpatient visit, typically 15 minutes	74	51	$89.92	$61.31
G0442 Annual alcohol misuse screening, 5 to 15 minutes	12	12	$20.00	$14.70
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	11	11	$250.00	$141.14
G0444 Annual depression screening, 5 to 15 minutes	11	11	$20.00	$14.70

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	112	64	$55.00	$35.31
99213 Established patient office or other outpatient visit, typically 15 minutes	48	33	$86.63	$58.16

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	123	70	$52.22	$34.97
99213 Established patient office or other outpatient visit, typically 15 minutes	53	34	$87.00	$58.91

Medical Specialties & State Licenses

Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

State License PA MA000154L

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

3 Associated Practitioners

Dr. Charles Stotler , MD

Family Medicine

NPI 1114998333

Doctor of Medicine (M.D.)

Melissa Leonardis , PA

Physician Assistant

NPI 1396716601

Physician Assistant

Jimmy Pyakurel

Family Medicine

NPI 1720240112

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active July 08, 2007

NPI status registered as active in NPPES database

📍

Updated Practice Location July 08, 2007

Registered at 334 BLOOMFIELD ST, STE 205, JOHNSTOWN, PA 15904 (Tel: 8142668686)

📍

Updated Business Mailing Address July 08, 2007

Registered at 334 BLOOMFIELD ST, STE 205, JOHNSTOWN, PA 15904 (Tel: 8142668686)

👤

Provider Name / Credentials Updated July 08, 2007

Recorded as JOHN ONDERKO, PAC

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 08, 2007

Physician Assistant (License #MA000154L in PA)

🟢

Initial NPI Registration & Enumeration January 27, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1548231863

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: January 27, 2006

Last Update: July 13, 2026

Sole Proprietor: No

Update or Correct Profile

Mailing Address

334 Bloomfield St, Ste 205

Johnstown, PA 15904

Phone: 8142668686

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.