Marc Clapper, D.O.
NPI 1881711182 · Anatomic Pathology & Clinical Pathology Physician · Johnstown, PA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Marc Clapper, D.O. is a Anatomic Pathology & Clinical Pathology Physician provider in Johnstown, PA (NPI 1881711182).
Provider details
- NPI number
- 1881711182
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- OT011820 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
1,493 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 432 | $34 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 301 | $26 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 119 | $32 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 108 | $73 |
| Special Stained Specimen Slides to Examine Tissue, Each Multiplex Procedure88344 | 88 | $35 |
| Cell Examination of Specimen, Selective Cellular Enhancement Technique88112 | 81 | $26 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-23
- Last updated
- 2023-01-29
- Certified
- 2023-01-29
Frequently asked questions
- What is Marc Clapper's NPI number?
- Marc Clapper's National Provider Identifier (NPI) is 1881711182, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marc Clapper's specialty?
- Marc Clapper is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is Marc Clapper located?
- Marc Clapper's practice location on file with NPPES is 1086 Franklin St, Johnstown, PA 15905-4305.
- What is Marc Clapper's phone number?
- The practice phone number listed in the NPPES registry for Marc Clapper is (814) 534-9892.
- Does Marc Clapper accept Medicare?
- Marc Clapper is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Marc Clapper's NPI active?
- Yes — Marc Clapper's NPI (1881711182) is active in the NPPES registry as of the last update on 2023-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.