Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Marc Joseph Clapper, DO

Individual provider General Practice Physician · NPI 1881711182

Marc Joseph Clapper, DO practises Pathology in Johnstown, Pennsylvania. Graduated from Lake Erie College of Osteopathic Medicine, Erie in 2006, 20 years ago. Practices with University of Pittsburgh Physicians, a 4,127-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
20
Trained at
Lake Erie College of Osteopathic Medicine, Erie
Licensed in
PA
In the registry since
2007
Specialties on file
2
What do these letters mean?
DO — Doctor of Osteopathic Medicine
A fully licensed physician, trained like an MD with additional musculoskeletal training. Equivalent practice rights in all 50 states.

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Practice location Address checks out

1086 Franklin St
Johnstown, PA 15905-4305
Phone: (814) 534-9892
Fax: (814) 534-9137
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence OS014283 (PA)
General Practice Physician Taxonomy 208D00000X · Licence OT011820 (PA)

Record details

NPI number1881711182
Entity typeIndividual (Type 1)
GenderMale
Credentials DO
Sole proprietorNo
NPI enumeratedMarch 23, 2007
Last updated in NPPESJanuary 29, 2023
Certification dateJanuary 29, 2023

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolLAKE ERIE COLLEGE OF OSTEOPATHIC MEDICINE, ERIE
Graduated 2006 (20 years in practice)
Group practice University Of Pittsburgh Physicians — 4127 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations3 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients412
Services billed 1,586 a service is one billed item, such as a visit, a test or a procedure
Average patient age72

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Colleagues at University of Pittsburgh Physicians

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 4127 clinicians in the practice; 12 are shown here.

Other providers in Johnstown