Gregory Aaron Raczniak, M.D., PH.D., M.PHIL

Primary specialty

Occupational Medicine PhysicianTaxonomy code 2083X0100X

License

MD22330 Issued in HI

Practice address

820 Mililani St Ste 745
Honolulu, HI 96813-2986

Phone

(808) 481-6678

NPI assigned

Mar 9, 2006

Sex

Male

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

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

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.

• Uscg Air Station Barbers Point

  • Military/U.S. Coast Guard Outpatient Clinic/Center
  • Kapolei, HI
  • NPI 1750548277
  NPD (past)
• Uscg Clinic Barbers Point

  • Military/U.S. Coast Guard Outpatient Clinic/Center
  • Norfolk, VA
  • NPI 1194252668
  NPD (past)

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

{
    "created_epoch": "1141862400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1788480000000",
    "number": "1861460636",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "820 MILILANI ST STE 745",
            "city": "HONOLULU",
            "state": "HI",
            "postal_code": "968132986",
            "telephone_number": "808-481-6678"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "820 MILILANI ST STE 745",
            "city": "HONOLULU",
            "state": "HI",
            "postal_code": "968132986",
            "telephone_number": "808-481-6678"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1003 Bishop St Ste 820",
            "address_purpose": "LOCATION",
            "city": "Honolulu",
            "state": "HI",
            "postal_code": "968136421",
            "country_code": "US",
            "telephone_number": "808-481-6678",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1 Coral Sea St",
            "address_purpose": "LOCATION",
            "city": "Kapolei",
            "state": "HI",
            "postal_code": "967073693",
            "country_code": "US",
            "telephone_number": "808-682-2673",
            "fax_number": "808-682-2779",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "RACZNIAK",
        "first_name": "GREGORY",
        "middle_name": "AARON",
        "name_prefix": "Dr.",
        "credential": "M.D., PH.D., M.PHIL",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-03-09",
        "last_updated": "2026-09-04",
        "certification_date": "2026-09-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2083P0901X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Preventive Medicine, Public Health & General Preventive Medicine",
            "state": "HI",
            "license": "MD-22330",
            "primary": false
        },
        {
            "code": "2083X0100X",
            "taxonomy_group": "",
            "desc": "Preventive Medicine, Occupational Medicine",
            "state": "HI",
            "license": "MD22330",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Occupational Medicine Physician in Honolulu, HI
• Providers in Honolulu, HI by specialty
• Occupational Medicine Physician in Hawaii

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 4, 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.