RJ Williams

Primary specialty

Clinical & Laboratory Immunology (Internal Medicine) PhysicianTaxonomy code 207RI0001X

License

45D2330202 Issued in TX

Practice address

2743 Smith Ranch Rd Ste 1904
Pearland, TX 77584-0188

Phone

(713) 551-8743

NPI assigned

Dec 15, 2025

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

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.

• Main Stop Testing SVCS

  • Clinical Medical Laboratory
  • Pearland, TX
  • NPI 1629920962
  NPD Authorized official

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

{
    "created_epoch": "1765756800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767916800000",
    "number": "1780548610",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2743 SMITH RANCH RD STE 1904",
            "city": "PEARLAND",
            "state": "TX",
            "postal_code": "775840188",
            "telephone_number": "713-551-8743"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2743 SMITH RANCH RD STE 1904",
            "city": "PEARLAND",
            "state": "TX",
            "postal_code": "775840188",
            "telephone_number": "713-551-8743"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "RJ",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2025-12-15",
        "last_updated": "2026-01-09",
        "certification_date": "2026-01-09",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RI0001X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Clinical & Laboratory Immunology",
            "state": "TX",
            "license": "45D2330202",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Lenett Williams
• Mark Anthony Williams II
• Marquita Williams
• Morgan Nicole Williams, LPC
• Paul Logan Williams
• Shacarla Watkins Williams, PHARMD., R.PH.
• Shawnice Williams
• Sydney Brielle Williams, RN
• Taylor L Williams, M.ED., LPC, LCDC
• Valerie Williams

• Internal Medicine Physician in Pearland, TX
• Providers in Pearland, TX by specialty
• Internal Medicine Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 9, 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.