Mary B Deegan Haff, D.O.

Primary specialty

Pediatric Adolescent Medicine PhysicianTaxonomy code 2080A0000X

License

245621-1 Issued in NY

Practice address

259 1St St
Mineola, NY 11501-3957

Phone

(516) 663-2829

NPI assigned

Aug 30, 2007

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

Electronic endpoints 1

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mdeeganhaff296892@nyumc.direct-ci.com

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 University

  • Cardiovascular Disease Physician
  • Boynton Beach, FL
  • NPI 1285826438

  NY

  Medicare reassignment NPD
• New York University

  • Physical Medicine & Rehabilitation Physician
  • Boynton Beach, FL
  • NPI 1104787613
  NPD

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

{
    "created_epoch": "1188432000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777334400000",
    "number": "1659565919",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "259 1ST ST",
            "city": "MINEOLA",
            "state": "NY",
            "postal_code": "115013957",
            "telephone_number": "516-663-2500",
            "fax_number": "516-663-8412"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "259 1ST ST",
            "city": "MINEOLA",
            "state": "NY",
            "postal_code": "115013957",
            "telephone_number": "516-663-2829"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DEEGAN HAFF",
        "first_name": "MARY",
        "middle_name": "B",
        "name_prefix": "Dr.",
        "credential": "D.O.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-08-30",
        "last_updated": "2026-04-28",
        "certification_date": "2026-04-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207PP0204X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine, Pediatric Emergency Medicine",
            "state": "NY",
            "license": "245621",
            "primary": false
        },
        {
            "code": "2080A0000X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Adolescent Medicine",
            "state": "NY",
            "license": "245621-1",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "mdeeganhaff296892@nyumc.direct-ci.com",
            "affiliation": "N",
            "address_1": "259 1st St",
            "city": "Mineola",
            "state": "NY",
            "country_code": "US",
            "postal_code": "115013957",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Valerie De Leon, PA-C
• David Paul Deacetis
• Magdalena Quimpo Deblois, ANP
• Don Decrosta, D.O.
• Inge Decrosta
• Tara Deitrick
• Charlene Del Rosario
• Theresa M Del Vecchio, ANP-C
• Maryellen Delcarpine, ANP
• Joshua Deleon, MD

• Pediatric Adolescent Medicine Physician in Mineola, NY
• Providers in Mineola, NY by specialty
• Pediatric Adolescent Medicine Physician in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 28, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.