Individual provider Active NPI

Colm Johnston

  • Psychologist
  • Arlington, VA
National Provider Identifier
1124935671
Registry record updated Aug 27, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
PsychologistTaxonomy code 103T00000X
License
0810009507 Issued in VA
Practice address
2000 15TH St N Ste 1003
Arlington, VA 22201-2610
Phone
(703) 520-1072
NPI assigned
Aug 27, 2026
Sex
Male
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Aug 27, 2026

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

Specialties & licenses 1

Specialty (taxonomy)CodeLicenseStatePrimary
Psychologist 103T00000X 0810009507 VA Primary

Addresses

Primary practice location

2000 15TH St N Ste 1003
Arlington, VA 22201-2610

Mailing address

2000 15TH St N Ste 1003
Arlington, VA 22201-2610

Medicare participation

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

NPI Registry JSON

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

{
    "created_epoch": "1787788800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1787788800000",
    "number": "1124935671",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2000 15TH ST N STE 1003",
            "city": "ARLINGTON",
            "state": "VA",
            "postal_code": "222012610"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2000 15TH ST N STE 1003",
            "city": "ARLINGTON",
            "state": "VA",
            "postal_code": "222012610",
            "telephone_number": "703-520-1072"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "JOHNSTON",
        "first_name": "COLM",
        "name_prefix": "Dr.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2026-08-27",
        "last_updated": "2026-08-27",
        "certification_date": "2026-08-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "VA",
            "license": "0810009507",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Arlington, VA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 27, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.

Verify at the official NPI Registry.