Individual provider Active NPI

Mark E Grieco, X-RAY TECH

  • Radiologic Technologist
  • Washington, DC
National Provider Identifier
1780650259
Registry record updated Jul 13, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Radiologic TechnologistTaxonomy code 247100000X
Practice address
Uscg HQ, Comdt (CG-1122)
2100 2ND Street, RM 5314
Washington, DC 20593-0001
Phone
(860) 444-8402
NPI assigned
Feb 24, 2006
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 1

Specialty (taxonomy)CodeLicenseStatePrimary
Radiologic Technologist 247100000X Primary

Addresses

Primary practice location

Uscg HQ, Comdt (CG-1122)
2100 2ND Street, RM 5314
Washington, DC 20593-0001

Mailing address

219 Charter Oak Dr
Groton, CT 06340-2934

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)
Not enrolled

Practice roles

OrganizationSpecialtyStatusNew patients
Uscg Academy Past Accepting new patients

Organizations & group practices 1

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.

NPI Registry JSON

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

{
    "created_epoch": "1140739200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1780650259",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "219 CHARTER OAK DR",
            "city": "GROTON",
            "state": "CT",
            "postal_code": "063402934"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "USCG HQ, COMDT (CG-1122)",
            "address_2": "2100 2ND STREET, RM 5314",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "205930001",
            "telephone_number": "860-444-8402"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GRIECO",
        "first_name": "MARK",
        "middle_name": "E",
        "credential": "X-RAY TECH",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-02-24",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "247100000X",
            "taxonomy_group": "",
            "desc": "Radiologic Technologist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Washington, DC

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.