Marissa Naomi Karpoff, M.D.

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

MD464904 Issued in PA

Practice address

100 E Lancaster Ave Ste 137
Wynnewood, PA 19096-3453

Phone

(610) 896-8400

Fax

(610) 896-9652

NPI assigned

Mar 20, 2013

Sex

Female

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Medicare fee-for-service enrollment

Enrolled in NJ, PA2 enrollments

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 2

Specialty

Rheumatology

Education

Tulane University School of Medicine, 2013

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

CMC Department of Medicine Group PAGroup PAC ID 2163335878, 474 clinicians

Bryn Mawr Medical Specialists AssociationGroup PAC ID 4183610934, 135 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Cooper University Hospital Hospital, Camden, NJ, CCN 310014
• Main Line Hospital Lankenau Hospital, Wynnewood, PA, CCN 390195
• Bryn Mawr Hospital Hospital, Bryn Mawr, PA, CCN 390139
• Hospital of Univ of Pennsylvania Hospital, Philadelphia, PA, CCN 390111

Merit-based Incentive Payment System (MIPS)

Final score

91.83 of 100Reported as group

Quality

88.78

Promoting interoperability

99

Improvement activities

40

Cost

74.17

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mkarpoff88264@direct.cooperhealth.edu

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.

• Bryn Mawr Medical Specialists Association

  • Multi-Specialty Clinic/Center
  • Bryn Mawr, PA
  • NPI 1841226099
  Medicare reassignment Care Compare group NPD
• CMC Department of Medicine Group PA

  • Cardiovascular Disease Physician
  • Camden, NJ
  • NPI 1609908094
  Medicare reassignment Care Compare group
• CMC Department of Medicine Group PA

  • Specialist
  • Camden, NJ
  • NPI 1386682094
  NPD
• CMC Department of Medicine Group PA

  • Rheumatology Physician
  • Cherry Hill, NJ
  • NPI 1922130129
  NPD

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

• Hospital of the University of PA

  • Ambulatory Fertility Facility
  • Phila, PA
  • NPI 1033262316

  Hospital

  Care Compare affiliation
• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Wynnewood, PA
  • NPI 1245335629
  Care Compare affiliation
• Main Line Hospitals, Inc.

  • General Acute Care Hospital
  • Bryn Mawr, PA
  • NPI 1508971441
  Care Compare affiliation
• Trustees of the University of Pennsylvania

  • General Acute Care Hospital
  • Philadelphia, PA
  • NPI 1851370910
  Care Compare affiliation
• The Cooper Health System

  • Land Ambulance
  • Camden, NJ
  • NPI 1174976724

  Hospital

  Care Compare affiliation
• The Cooper Health System

  • General Acute Care Hospital
  • Camden, NJ
  • NPI 1568442309
  Care Compare affiliation

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

{
    "created_epoch": "1363737600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776211200000",
    "number": "1659613347",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 FEDERAL ST # 200",
            "city": "CAMDEN",
            "state": "NJ",
            "postal_code": "081031088",
            "telephone_number": "856-356-4924"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 E LANCASTER AVE STE 137",
            "city": "WYNNEWOOD",
            "state": "PA",
            "postal_code": "190963453",
            "telephone_number": "610-896-8400",
            "fax_number": "610-896-9652"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1275 York Ave",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100656007",
            "country_code": "US",
            "telephone_number": "212-639-2734",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1275 York Ave",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100656007",
            "country_code": "US",
            "telephone_number": "212-639-2734",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1935 Route 70 E Fl 2",
            "address_purpose": "LOCATION",
            "city": "Cherry Hill",
            "state": "NJ",
            "postal_code": "08003",
            "country_code": "US",
            "telephone_number": "856-428-7700",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "825 Old Lancaster Rd Ste 320",
            "address_purpose": "LOCATION",
            "city": "Bryn Mawr",
            "state": "PA",
            "postal_code": "190103235",
            "country_code": "US",
            "telephone_number": "610-527-3800",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "KARPOFF",
        "first_name": "MARISSA",
        "middle_name": "NAOMI",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2013-03-20",
        "last_updated": "2026-04-15",
        "certification_date": "2026-04-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "PA",
            "license": "MD464904",
            "primary": true
        },
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "NJ",
            "license": "25MA10574700",
            "primary": false
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "NY",
            "license": "277829",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kathryn Kaminski, MD
• Matthew Kaminski, CRNP
• Loukya Kanakamedala, DO
• David M. Kanze, D.O.
• Kylie Ann Kanze, D.O.
• Michelle M Karten, M.D.
• Russell J Karten, MD
• Lauren I Kasoff
• Eric M Kasprowicz, M.D.
• Eliana Rae Katz, PA-C

• Rheumatology Physician in Wynnewood, PA
• Providers in Wynnewood, PA by specialty
• Rheumatology Physician in Pennsylvania

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 15, 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.