Robert A Williamson, M.D.

Primary specialty

General Practice PhysicianTaxonomy code 208D00000X

License

D9725 Issued in TX

Practice address

1605 N Sarah Dewitt Dr
Gonzales, TX 78629-2700

Phone

(830) 672-4601

Fax

(830) 672-8101

NPI assigned

Jul 7, 2005

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)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Interoperability endpoints

• FHIR API: https://fhir.nextgen.com/nge/prod/fhir-api-r4/fhir/r4/

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.

• Gonzales Healthcare Systems

  • Rural Health Clinic/Center
  • Gonzales, TX
  • NPI 1013916287
  NPD (past)
• Gonzales Healthcare Systems

  • General Acute Care Hospital
  • Gonzales, TX
  • NPI 1508859612
  NPD (past)

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

{
    "created_epoch": "1120694400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1821095696",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 1840",
            "city": "GONZALES",
            "state": "TX",
            "postal_code": "786291340",
            "telephone_number": "830-672-4601",
            "fax_number": "830-672-8101"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1605 N SARAH DEWITT DR",
            "city": "GONZALES",
            "state": "TX",
            "postal_code": "786292700",
            "telephone_number": "830-672-4601",
            "fax_number": "830-672-8101"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "ROBERT",
        "middle_name": "A",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-07-07",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "208D00000X",
            "taxonomy_group": "",
            "desc": "General Practice",
            "state": "TX",
            "license": "D9725",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Christopher Lee Walker, M.D.
• Yvette Welch, LPC
• Sarah Elizabeth Westerfield, LPC
• Kate J Wilde, CCC/SLP
• Eva Williams
• Kristen Wollmuth, RD
• Lisa Marie Wright, P.A
• Benjamin Wroblewski, MD
• Gail Wyatt, LVN
• Tammie Lynn Wyrick, DENTAL HYGIENIST

• General Practice Physician in Gonzales, TX
• Providers in Gonzales, TX by specialty
• General Practice Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.