Mark Walker

Primary specialty

Mental Health CounselorTaxonomy code 101YM0800X

License

0704018280 Issued in VA

Practice address

11166 Fairfax Blvd Ste 201
Fairfax, VA 22030-5017

Phone

(703) 988-4236

Fax

(703) 721-7598

NPI assigned

Aug 4, 2025

Sex

Male

Sole proprietor

No

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

State licenses

Practice roles

Locations

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.

• Neutral Ground Counseling Group

  • Mental Health Counselor
  • Fairfax, VA
  • NPI 1144935651
  NPD

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

{
    "created_epoch": "1754265600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1754265600000",
    "number": "1649154584",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "11166 FAIRFAX BLVD STE 201",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220305017",
            "telephone_number": "703-988-4236",
            "fax_number": "703-721-7598"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "11166 FAIRFAX BLVD STE 201",
            "city": "FAIRFAX",
            "state": "VA",
            "postal_code": "220305017",
            "telephone_number": "703-988-4236",
            "fax_number": "703-721-7598"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WALKER",
        "first_name": "MARK",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-08-04",
        "last_updated": "2025-08-04",
        "certification_date": "2025-08-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "VA",
            "license": "0704018280",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jourdan Elizabeth Walker
• Katharine Currier Walker, ATR-BC, LPC
• Kelly Walker, LMFT
• Lisa Walker, M.A. CCC-SLP
• Lois Stash Walker, RN,CS
• Sharon Harley Walker, OTR
• Valetta Mouphy Walker
• Jonathan Michael Wall
• Meredith Wall, MSN, FNP-BC
• Ashlyn Wallace, FNP-C

• 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 Aug 4, 2025; 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.