Mary Katherine O'Sullivan, DNP, ARNP

Primary specialty

Acute Care Nurse PractitionerTaxonomy code 363LA2100X

License

3290436 Issued in NY

Practice address

1275 York Ave
New York, NY 10065-6007

Phone

(347) 798-9213

NPI assigned

Aug 31, 2020

Sex

Female

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Merit-based Incentive Payment System (MIPS)

Final score

93.85 of 100Reported as apm

Quality

74.6

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Nurse Practitioner

State licenses

Practice roles

Locations

Networks

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

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.

• Memorial Hematology Lymphoma Group

  • Hematology & Oncology Physician
  • New York, NY
  • NPI 1891766366
  Medicare reassignment NPD
• Mskcc Clinical Practice Plan

  • Medical Oncology Physician
  • New York, NY
  • NPI 1588789341
  Medicare reassignment NPD
• Memorial Hematology Lymphoma Group

  • Medical Oncology Physician
  • New York, NY
  • NPI 1245945021
  NPD
• Mskcc Clinical Practice Plan

  • Urology Physician
  • New York, NY
  • NPI 1306096508
  NPD

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

{
    "created_epoch": "1598832000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1746403200000",
    "number": "1699389494",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1275 YORK AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100656007"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1275 YORK AVE",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100656007",
            "telephone_number": "347-798-9213"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "O'SULLIVAN",
        "first_name": "MARY",
        "middle_name": "KATHERINE",
        "credential": "DNP, ARNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-08-31",
        "last_updated": "2025-05-05",
        "certification_date": "2025-05-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LA2100X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Acute Care",
            "state": "WA",
            "license": "AP61441998",
            "primary": false
        },
        {
            "code": "363LA2100X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Acute Care",
            "state": "NY",
            "license": "3290436",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Geoffrey Michael O'Sullivan, RPA-C
• Kelly Catherine O'Sullivan, LCSW
• Kelly Catherine O'Sullivan, MSN, AGACNP-BC
• Kerry O'Sullivan
• Maeve O'Sullivan
• Mary M O'Sullivan, M.D.
• Megan Elizabeth O'Sullivan, PT
• Michelle O'Sullivan
• Alexis O'Toole, RN
• Christine M O'Toole, LCSW

• Acute Care Nurse Practitioner in New York, NY
• Providers in New York, NY by specialty
• Acute Care Nurse Practitioner in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 5, 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.