William Lassiter Holmes IV, MD

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

V8283 Issued in TX

Practice address

1100 W 34TH St
Houston, TX 77018-6206

Phone

(713) 861-3939

NPI assigned

Mar 18, 2022

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

Enrolled in TX

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Family Practice

Education

Baylor College of Medicine, 2017

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

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.

• Rio Grande Valley Adult & Internal Medicine Specialists PLLC

  • Internal Medicine Physician
  • Weslaco, TX
  • NPI 1528039120
  Medicare reassignment

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

{
    "created_epoch": "1647561600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1769385600000",
    "number": "1063161065",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1100 W 34TH ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770186206",
            "telephone_number": "713-861-3939"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1100 W 34TH ST",
            "city": "HOUSTON",
            "state": "TX",
            "postal_code": "770186206",
            "telephone_number": "713-861-3939"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HOLMES",
        "first_name": "WILLIAM",
        "middle_name": "LASSITER",
        "name_prefix": "Dr.",
        "name_suffix": "IV",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-03-18",
        "last_updated": "2026-01-26",
        "certification_date": "2026-01-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "TX",
            "license": "V8283",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Tequila Holmes, CNA
• Terence S Holmes, M.D.
• Teresa Holmes, PHARM.D.
• Tessa Holmes, LCSW
• Veronica M Holmes, CPNP-PC
• Holmsten Family & Occupational Medicine
• Charles G Holmsten, M.D.
• Walter R Holmsten, MD
• Catherine S Holste, MD
• Ashley Christine Holston, SLP-ASST

• Family Medicine Physician in Houston, TX
• Providers in Houston, TX by specialty
• Family Medicine Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 26, 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.