James Gavin Wallace-Mercado, DNP, MSN, FNP-C

Primary specialty

Family Nurse PractitionerTaxonomy code 363LF0000X

License

NP200003078 Issued in DC

Practice address

1350 Connecticut Ave NW Ste 1250
Washington, DC 20036-1728

Phone

(888) 663-6331

Fax

(415) 252-7176

NPI assigned

Jul 27, 2022

Sex

Male

Sole proprietor

No

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

Specialties & licenses 10

Addresses

Medicare fee-for-service enrollment

Enrolled in DC

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: No

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Science - Nursing, Nurse Practitioner

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.

• Neighborhood Health

  • Federally Qualified Health Center (FQHC)
  • Alexandria, VA
  • NPI 1154674026

  DC

  Medicare reassignment NPD
• Neighborhood Health

  • Federally Qualified Health Center (FQHC)
  • Arlington, VA
  • NPI 1225899719

  Nurse Practitioner

  NPD
• Neighborhood Health

  • Federally Qualified Health Center (FQHC)
  • Alexandria, VA
  • NPI 1902104532
  NPD

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

{
    "created_epoch": "1658880000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779667200000",
    "number": "1023744406",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1 EMBARCADERO CTR STE 1900",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941113723",
            "telephone_number": "888-663-6331"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1350 CONNECTICUT AVE NW STE 1250",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "200361728",
            "telephone_number": "888-663-6331",
            "fax_number": "415-252-7176"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "6677 Richmond Hwy",
            "address_purpose": "LOCATION",
            "city": "Alexandria",
            "state": "VA",
            "postal_code": "223066647",
            "country_code": "US",
            "telephone_number": "703-535-5568",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "3001 Palm Way Ste D134",
            "address_purpose": "LOCATION",
            "city": "Austin",
            "state": "TX",
            "postal_code": "787587963",
            "country_code": "US",
            "telephone_number": "415-291-0480",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "4540B John Marr Dr",
            "address_purpose": "LOCATION",
            "city": "Annandale",
            "state": "VA",
            "postal_code": "220033308",
            "country_code": "US",
            "telephone_number": "703-941-6757",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WALLACE-MERCADO",
        "first_name": "JAMES",
        "middle_name": "GAVIN",
        "name_prefix": "Dr.",
        "credential": "DNP, MSN, FNP-C",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-07-27",
        "last_updated": "2026-05-25",
        "certification_date": "2026-05-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "NM",
            "license": "76798",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "VA",
            "license": "0024185745",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MS",
            "license": "908120",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "AL",
            "license": "3-002726",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "DC",
            "license": "NP200003078",
            "primary": true
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "FL",
            "license": "APRN11033095",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "GA",
            "license": "GAA-NP004634",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "MD",
            "license": "AC008761",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "NY",
            "license": "358275",
            "primary": false
        },
        {
            "code": "363LF0000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Family",
            "state": "TX",
            "license": "1168661",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Russell Wall
• Shaunice Wall, DIETITIAN
• Stephen Joseph Wall, M.D.,PH.D.
• Thomas M Wall, D.D.S., P.C.
• Colleen Michelle Wallace McKay, M.D.
• Aaliyah Dianne Wallace
• Annie Wallace
• Cynthia Wallace, HHA
• Demetria Wallace
• Jaclyn Wallace

• Family Nurse Practitioner in Washington, DC
• Providers in Washington, DC by specialty
• Family Nurse Practitioner in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 25, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.