Joseph Mernagh, M.S.

Primary specialty

Mental Health CounselorTaxonomy code 101YM0800X

License

0704015348 Issued in VA

Practice address

2911 Deer Hollow Way Unit 424
Fairfax, VA 22031-6049

Phone

(330) 310-5290

NPI assigned

Oct 19, 2022

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Master of Science

State licenses

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

{
    "created_epoch": "1666137600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769990400000",
    "number": "1992421069",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2911 DEER HOLLOW WAY UNIT 424",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220316049",
            "telephone_number": "330-310-5290"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2911 DEER HOLLOW WAY UNIT 424",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220316049",
            "telephone_number": "330-310-5290"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MERNAGH",
        "first_name": "JOSEPH",
        "credential": "M.S.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-10-19",
        "last_updated": "2026-02-02",
        "certification_date": "2026-02-02",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "193200000X MULTI-SPECIALTY GROUP",
            "desc": "Counselor, Mental Health",
            "state": "VA",
            "license": "0704015348",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Mental Health Counselor in Fairfax, VA
• Providers in Fairfax, VA by specialty
• Mental Health Counselor in Virginia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 2, 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.