Karen Patricia Seiter, M.D.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

83187 Issued in CT

Practice address

19 Bradhurst Ave
Suite 2100
Hawthorne, NY 10532-2140

Phone

(914) 493-8375

Fax

(914) 347-1832

NPI assigned

Apr 5, 2006

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

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in NY, CT2 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

Hematology/Oncology

Education

New York Medical College, 1985

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Nuvance Health Medical Practice CT IncGroup PAC ID 4789597691, 742 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Danbury Hospital Hospital, Danbury, CT, CCN 070033
• Westchester Medical Center Hospital, Valhalla, NY, CCN 330234

Merit-based Incentive Payment System (MIPS)

Final score

75 of 100Reported as group

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

• Healthfirst Medicare Network H3359
• Healthfirst Medicare Network H5989
• Healthfirst Medicare Network H1722
• Healthfirst Medicare Network H9678

Interoperability endpoints

• FHIR API: https://fhir-myrecord.cerner.com/r4/0e5efebe-b60c-458e-971a-ee39e08a2178/

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.

• Nuvance Health Medical Practice CT, Inc.

  • Internal Medicine Physician
  • Danbury, CT
  • NPI 1407898117

  Hematology

  Medicare reassignment Care Compare group NPD
• Phelps Memorial Hospital Association

  • General Acute Care Hospital
  • Sleepy Hollow, NY
  • NPI 1720185267
  Medicare reassignment NPD
• Westchester Medical Center Advanced Physician Services, PC

  • Surgery Physician
  • Valhalla, NY
  • NPI 1912131392
  Medicare reassignment NPD
• Phelps Memorial Hospital Association

  • Internal Medicine Physician
  • Sleepy Hollow, NY
  • NPI 1003908658
  NPD
• Phelps Memorial Hospital Association

  • Community/Retail Pharmacy
  • Sleepy Hollow, NY
  • NPI 1285706077
  NPD
• Westchester Medical Center Advanced Physician Services PC

  • Anesthesiology Physician
  • Valhalla, NY
  • NPI 1740687458
  NPD
• Westchester County Health Care Corporation

  • Skilled Nursing Facility
  • Hawthorne, NY
  • NPI 1487735072
  NPD (past)
• Westchester County Health Care Corporation

  • General Acute Care Hospital
  • Valhalla, NY
  • NPI 1932280666
  NPD (past)
• Westchester Medical Center

  • General Acute Care Hospital
  • Valhalla, NY
  • NPI 1023286184
  NPD (past)
• Westchester Oncology & Hematology Group, P.C.

  • Family Nurse Practitioner
  • Hawthorne, NY
  • NPI 1598727315

  Hematology

  NPD (past)

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

• Westchester County Health Care Corporation

  • General Acute Care Hospital
  • Valhalla, NY
  • NPI 1932280666
  Care Compare affiliation
• Danbury Hospital

  • Dental Clinic/Center
  • Danbury, CT
  • NPI 1003835935

  Hospital

  Care Compare affiliation
• Danbury Hospital

  • General Acute Care Hospital
  • Danbury, CT
  • NPI 1548293343
  Care Compare affiliation

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

{
    "created_epoch": "1144195200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1760054400000",
    "number": "1265494124",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "95 LOCUST AVE",
            "city": "DANBURY",
            "state": "CT",
            "postal_code": "068106148",
            "telephone_number": "203-739-7029"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "19 BRADHURST AVE",
            "address_2": "SUITE 2100",
            "city": "HAWTHORNE",
            "state": "NY",
            "postal_code": "105322140",
            "telephone_number": "914-493-8375",
            "fax_number": "914-347-1832"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SEITER",
        "first_name": "KAREN",
        "middle_name": "PATRICIA",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2006-04-05",
        "last_updated": "2025-10-10",
        "certification_date": "2025-10-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology",
            "state": "CT",
            "license": "83187",
            "primary": false
        },
        {
            "code": "207RX0202X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Medical Oncology",
            "state": "CT",
            "license": "83187",
            "primary": false
        },
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CT",
            "license": "83187",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "01269112",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Dina Sedore, NP
• Mary C See, MD
• Jay Robert Seebacher, M.D.
• Sue Seiler, OT
• Maria Seisdedos, RD
• Karen P Seligman, MD
• Londe Selmon-Givan, PHYSICAL THERAPIST
• Denise Barbara Sepe, MD
• Servants of Relief for Incurable Cancer
• Renee Marie Sevcik, FNP

• Hematology & Oncology Physician in Hawthorne, NY
• Providers in Hawthorne, NY by specialty
• Hematology & Oncology Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 10, 2025; 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.