McKenna Alexis Williamson, DO

Primary specialty

Obstetrics & Gynecology PhysicianTaxonomy code 207V00000X

License

T6413 Issued in TX

Practice address

4315 James Casey St Ste 200
Austin, TX 78745-3364

Phone

(512) 383-9752

Fax

(512) 406-7336

NPI assigned

May 9, 2018

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Other identifiers 1

Other names 1

• Dr. McKenna Alexis Rubalcaba-Williamson Other name

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

Obstetrics/Gynecology

Education

Michigan State University College of Osteopathic Medicine, 2018

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Austin Regional Clinic PAGroup PAC ID 3072507789, 398 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mwilliamson27402@arcmd.direct-ci.com

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.

• Austin Regional Clinic, PA

  • Family Medicine Physician
  • Austin, TX
  • NPI 1821157579

  Obstetrics & Gynecology

  Medicare reassignment Care Compare group NPD
• Obhg Texas Holdings, P.a.

  • Obstetrics & Gynecology Physician
  • Austin, TX
  • NPI 1083917769
  Medicare reassignment NPD
• Austin Regional Clinic, PA

  • Durable Medical Equipment & Medical Supplies
  • Kyle, TX
  • NPI 1235746413
  NPD
• St. David'S Healthcare Partnership, L.P., LLP

  • General Acute Care Hospital
  • Austin, TX
  • NPI 1679528889
  NPD (past)

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

{
    "created_epoch": "1525824000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1746835200000",
    "number": "1225527773",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6210 E HWY 290",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787231142"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4315 JAMES CASEY ST STE 200",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787453364",
            "telephone_number": "512-383-9752",
            "fax_number": "512-406-7336"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WILLIAMSON",
        "first_name": "MCKENNA",
        "middle_name": "ALEXIS",
        "name_prefix": "Dr.",
        "credential": "DO",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2018-05-09",
        "last_updated": "2025-05-10",
        "certification_date": "2025-05-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207V00000X",
            "taxonomy_group": "",
            "desc": "Obstetrics & Gynecology",
            "state": "TX",
            "license": "T6413",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "PHYSICIAN MEDICAL LICENSE",
            "identifier": "T6413",
            "state": "TX"
        }
    ],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "MCKENNA",
            "last_name": "RUBALCABA-WILLIAMSON",
            "middle_name": "ALEXIS",
            "prefix": "DR.",
            "credential": "DO",
            "code": "5",
            "type": "Other Name"
        }
    ]
}

• Hayley Williamson
• John Andrew Williamson, M.D.
• John Charles Williamson, M.D.
• Katy Williamson, MS, CCC-SLP
• Kelli Lee Williamson, LMFT
• Michael Scott Williamson, D.D.S.,M.S
• Monica Monique Williamson
• Robert A. Williamson Jr., M.D.
• Jon Timothy Willie, MD
• Jennie L Willingham, PT

• Obstetrics & Gynecology Physician in Austin, TX
• Providers in Austin, TX by specialty
• Obstetrics & Gynecology Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 10, 2025; 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.