Francisco Javier Diaz Viera, MD

Primary specialty

Cardiovascular Disease PhysicianTaxonomy code 207RC0000X

License

T9901 Issued in TX

Practice address

6818 Austin Center Blvd Ste 205
Austin, TX 78731-3100

Phone

(512) 344-0450

Fax

(512) 406-7318

NPI assigned

May 23, 2019

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

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

Cardiovascular Disease (Cardiology)

Education

Other, 2019

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 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.

• Austin Regional Clinic, PA

  • Family Medicine Physician
  • Austin, TX
  • NPI 1821157579
  Medicare reassignment Care Compare group

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

{
    "created_epoch": "1558569600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770249600000",
    "number": "1174180269",
    "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",
            "telephone_number": "512-483-9596",
            "fax_number": "512-406-6216"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6818 AUSTIN CENTER BLVD STE 205",
            "city": "AUSTIN",
            "state": "TX",
            "postal_code": "787313100",
            "telephone_number": "512-344-0450",
            "fax_number": "512-406-7318"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAZ VIERA",
        "first_name": "FRANCISCO",
        "middle_name": "JAVIER",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-05-23",
        "last_updated": "2026-02-05",
        "certification_date": "2026-02-05",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RC0000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Cardiovascular Disease",
            "state": "TX",
            "license": "T9901",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "693889",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Hannia Diaz Ayllon, MD
• Camilla Yvette Diaz de Leon, PTA
• Emma Diaz de Leon, MD
• Elizabeth Diaz Donjuan
• Martha Patricia Diaz Marin
• Carlos Alberto Diaz-Laboy, DMD
• Adrienne Diaz, LCSW
• Alyssa Nicole Diaz, PTA
• Candice Lee Diaz
• Carina Diaz

• Cardiovascular Disease Physician in Austin, TX
• Providers in Austin, TX by specialty
• Cardiovascular Disease Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 5, 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.