Melissa Dillon Horowitz, PSYD

Primary specialty

PsychologistTaxonomy code 103T00000X

License

018527 Issued in NY

Practice address

150 E 58TH Street
Fifth Floor Annex
New York, NY 10155

Phone

(212) 308-2440

Fax

(212) 308-3099

NPI assigned

Apr 9, 2010

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

Not listed in the public Medicare enrollment file

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.

Specialty

Clinical Psychologist

Education

Philadelphia College of Osteopathic Medicine, 2008

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

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.

• Dr Robert L Leahy Psychologist PC Dba American Institute for Cognitiv

  dba American Institute for Cognitive Therapy

  • Cognitive & Behavioral Psychologist
  • New York, NY
  • NPI 1134324106
  NPD (past)
• The Shield of David, Inc.

  dba The Shield Institute

  • Clinic/Center
  • Bayside, NY
  • NPI 1184661290
  NPD (past)

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

{
    "created_epoch": "1270771200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768867200000",
    "number": "1659697068",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "150 E 58TH STREET",
            "address_2": "FIFTH FLOOR ANNEX",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "10155",
            "telephone_number": "212-308-2440",
            "fax_number": "212-308-3099"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "150 E 58TH STREET",
            "address_2": "FIFTH FLOOR ANNEX",
            "city": "NEW YORK",
            "state": "NY",
            "postal_code": "10155",
            "telephone_number": "212-308-2440",
            "fax_number": "212-308-3099"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOROWITZ",
        "first_name": "MELISSA",
        "middle_name": "DILLON",
        "credential": "PSYD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2010-04-09",
        "last_updated": "2026-01-20",
        "certification_date": "2026-01-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TB0200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Cognitive & Behavioral",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "NY",
            "license": "018527",
            "primary": true
        },
        {
            "code": "103TC0700X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical",
            "state": "NY",
            "license": "018527",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lauren Horowitz, OTR/L
• Mark David Horowitz, MD
• Marylin Horowitz, LP
• Matthew C Horowitz, O.D
• Maya Horowitz, LMSW
• Michael Jay Horowitz, DC
• Richard Alan Horowitz, RPH
• Richard Steven Horowitz, LCSW
• Robyn E Horowitz, M.D.
• Samantha Horowitz

• Psychologist in New York, NY
• Providers in New York, NY by specialty
• Psychologist in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 20, 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.