Individual provider Active NPI

John James Frost, MDPHD

  • Diagnostic Radiology Physician
  • New Haven, CT
National Provider Identifier
1831171552
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Diagnostic Radiology PhysicianTaxonomy code 2085R0202X
License
042865 Issued in CT
Practice address
800 Howard Ave
New Haven, CT 06519-1369
Phone
(203) 785-2140
Fax
(203) 785-6414
NPI assigned
Nov 17, 2005
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Jul 13, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Nuclear Medicine Physician 207U00000X 042865 CT
Diagnostic Radiology Physician 2085R0202X 042865 CT Primary

Addresses

Primary practice location

800 Howard Ave
New Haven, CT 06519-1369

Mailing address

300 George St
6TH Floor PO Box 9805
New Haven, CT 06536-0805
Phone (203) 785-7998

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Doctor of Medicine

State licenses

LicenseStateTypeSpecialty
042865CTMDDiagnostic Radiology Physician

NPI Registry JSON

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

{
    "created_epoch": "1132185600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1831171552",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "300 GEORGE ST",
            "address_2": "6TH FLOOR PO BOX 9805",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065360805",
            "telephone_number": "203-785-7998",
            "fax_number": "203-785-6414"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "800 HOWARD AVE",
            "city": "NEW HAVEN",
            "state": "CT",
            "postal_code": "065191369",
            "telephone_number": "203-785-2140",
            "fax_number": "203-785-6414"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "FROST",
        "first_name": "JOHN",
        "middle_name": "JAMES",
        "credential": "MDPHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-11-17",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207U00000X",
            "taxonomy_group": "",
            "desc": "Nuclear Medicine",
            "state": "CT",
            "license": "042865",
            "primary": false
        },
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "CT",
            "license": "042865",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in New Haven, CT

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.