Dianna Hardatt, M.D.

Primary specialty

Pediatric Hematology & Oncology PhysicianTaxonomy code 2080P0207X

License

307544 Issued in NY

Practice address

1650 Grand Concourse
Bronx, NY 10457-7679

Phone

(718) 992-7669

NPI assigned

Apr 11, 2017

Sex

Female

Sole proprietor

Yes

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: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hematology/OncologyAlso: Pediatric Medicine

Education

Other, 2016

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Networks

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

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.

• Bronxcare Health System

  • Internal Medicine Physician
  • Bronx, NY
  • NPI 1245390855

  Pediatrics

  Medicare reassignment NPD
• Bronxcare Health System

  • Methadone Clinic
  • Bronx, NY
  • NPI 1801428222
  NPD
• Bronxcare Health System

  • General Acute Care Hospital
  • Bronx, NY
  • NPI 1417027558
  NPD (past)

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

{
    "created_epoch": "1491868800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1763510400000",
    "number": "1295268738",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1650 GRAND CONCOURSE",
            "city": "BRONX",
            "state": "NY",
            "postal_code": "104577679",
            "telephone_number": "718-992-7669"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1650 GRAND CONCOURSE",
            "city": "BRONX",
            "state": "NY",
            "postal_code": "104577679",
            "telephone_number": "718-992-7669"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HARDATT",
        "first_name": "DIANNA",
        "credential": "M.D.",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2017-04-11",
        "last_updated": "2025-11-19",
        "certification_date": "2025-11-19",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2080P0207X",
            "taxonomy_group": "",
            "desc": "Pediatrics, Pediatric Hematology-Oncology",
            "state": "NY",
            "license": "307544",
            "primary": true
        },
        {
            "code": "208000000X",
            "taxonomy_group": "",
            "desc": "Pediatrics",
            "state": "NY",
            "license": "307544",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Harbor Apothecary Inc
• Harbor Family Health NP PLLC
• Harbor Primary Care PLLC
• Harborstone Community Services LLC
• Joseph Hardardt, MD
• Carolyn Ann Harden, MSW
• Wendell I. Harden, BA, CASAC
• John A Hardin, MD
• Katherine Lynn Harding, MD
• Melissa Elizabeth Harding, RPA-C

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Nov 19, 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.