Marc Joseph Clapper, D.O.

Primary specialty

Anatomic Pathology & Clinical Pathology PhysicianTaxonomy code 207ZP0102X

License

OS014283 Issued in PA

Practice address

1086 Franklin St
Johnstown, PA 15905-4305

Phone

(814) 534-9892

Fax

(814) 534-9137

NPI assigned

Mar 23, 2007

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Addresses

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in PA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Pathology

Education

Lake Erie College of Osteopathic Medicine, Erie, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

University of Pittsburgh PhysiciansGroup PAC ID 8729990239, 4,166 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Upmc Altoona Hospital, Altoona, PA, CCN 390073
• Upmc Bedford Memorial Hospital, Everett, PA, CCN 390117

Merit-based Incentive Payment System (MIPS)

Final score

80.94 of 100Reported as group

Quality

61.89

Promoting interoperability

100

Improvement activities

40

Cost

74.58

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mclapper513459@upmc.direct-ci.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• University of Pittsburgh Physicians

  • Gastroenterology Physician
  • Pittsburgh, PA
  • NPI 1619935004
  Medicare reassignment Care Compare group NPD
• University of Pittsburgh Physicians

  • Anatomic Pathology & Clinical Pathology Physician
  • Pittsburgh, PA
  • NPI 1245298652
  NPD
• University of Pittsburgh Physicians

  • Diagnostic Radiology Physician
  • Pittsburgh, PA
  • NPI 1285692699
  NPD
• Upmc Emergency Medicine Inc

  • Emergency Medicine Physician
  • Pittsburgh, PA
  • NPI 1891744041
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Upmc Altoona

  • Ambulatory Surgical Clinic/Center
  • Altoona, PA
  • NPI 1114926953

  Hospital

  Care Compare affiliation
• Upmc Altoona

  • Non-Surgical Family Planning Clinic/Center
  • Altoona, PA
  • NPI 1457303885

  Hospital

  Care Compare affiliation
• Upmc Altoona

  • General Acute Care Hospital
  • Altoona, PA
  • NPI 1649278730
  Care Compare affiliation
• Upmc Altoona

  • Psychiatric Hospital Unit
  • Altoona, PA
  • NPI 1699773465
  Care Compare affiliation
• Upmc Bedford Memorial

  • General Acute Care Hospital
  • Everett, PA
  • NPI 1295724193
  Care Compare affiliation
• Upmc Bedford Memorial

  • Ambulatory Surgical Clinic/Center
  • Everett, PA
  • NPI 1942345467

  Hospital

  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1174608000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787616000000",
    "number": "1881711182",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "620 HOWARD AVE",
            "city": "ALTOONA",
            "state": "PA",
            "postal_code": "166014804",
            "telephone_number": "814-889-2340",
            "fax_number": "814-889-6001"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1086 FRANKLIN ST",
            "city": "JOHNSTOWN",
            "state": "PA",
            "postal_code": "159054305",
            "telephone_number": "814-534-9892",
            "fax_number": "814-534-9137"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CLAPPER",
        "first_name": "MARC",
        "middle_name": "JOSEPH",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2007-03-23",
        "last_updated": "2026-08-25",
        "certification_date": "2023-01-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208D00000X",
            "taxonomy_group": "",
            "desc": "General Practice",
            "state": "PA",
            "license": "OT011820",
            "primary": false
        },
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "PA",
            "license": "OS014283",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mclapper513459@upmc.direct-ci.com",
            "affiliation": "N",
            "address_1": "600 Grant St",
            "address_2": "Floor 58",
            "city": "Pittsburgh",
            "state": "PA",
            "country_code": "US",
            "postal_code": "152192702",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Samantha Ann Christner
• Amanda Marie Chumrik, OT
• Timothy R Chung, DO
• Sebastian J. Ciacchella, MD
• Alicia Joy Ciarimboli, RN
• Clarity Hearing Solutions LLC
• Angelique Clark
• Jacob Asher Clark, MD
• Jill Anne Clark, BSW
• Michael Anthony Clark, M.S.W.

• Anatomic Pathology & Clinical Pathology Physician in Johnstown, PA
• Providers in Johnstown, PA by specialty
• Anatomic Pathology & Clinical Pathology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 25, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.