Katherine Twitchell, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

099724 Issued in NY

Practice address

227 Madison St FL 5
New York, NY 10002-7537

Phone

(212) 238-7350

NPI assigned

Jul 17, 2019

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in NY

Eligible to order & refer

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

Green means eligible to order or refer.

Enrollment records 1

Specialty

Clinical Social Worker

Education

Other, 2016

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Networks

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

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.

• New York City Health and Hospitals Corporation

  • Clinic/Center
  • New York, NY
  • NPI 1548208127
  Medicare reassignment

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

{
    "created_epoch": "1563321600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1758499200000",
    "number": "1992358147",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "45 RAVINE AVE APT 301",
            "city": "JERSEY CITY",
            "state": "NJ",
            "postal_code": "073072353"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "227 MADISON ST FL 5",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "100027537",
            "telephone_number": "212-238-7350"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TWITCHELL",
        "first_name": "KATHERINE",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2019-07-17",
        "last_updated": "2025-09-22",
        "certification_date": "2025-09-22",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "NY",
            "license": "099724",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "LMSW LICENSE",
            "identifier": "098432",
            "state": "NY"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Twilight Medical PC
• Twilight Mental Health Care LLC
• Twin Pharmacy 2 Corp
• Twin Pharmacy Corp
• Twiniversity
• Two Chairs Medical Services, a Professional Corporation
• Bridget Courtney Twohig, DNAP, CRNA
• Joseph David Twohig
• Katherine Twohig, LMSW
• Sophie Marie Twohig

• Clinical Social Worker in New York, NY
• Providers in New York, NY by specialty
• Clinical Social Worker in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 22, 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.