Gustavo R. Armaiz-Pena, M.D.

Primary specialty

Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X

License

S1976 Issued in TX

Practice address

4502 Medical Dr
San Antonio, TX 78229-4402

Phone

(210) 358-4000

NPI assigned

May 7, 2013

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Other identifiers 2

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

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• University of Texas Health Science Center at San Antonio

  dba UT Health Physicians

  • Internal Medicine Physician
  • San Antonio, TX
  • NPI 1720051717
  Medicare reassignment NPD
• The University of Texas Health Science Center at San Antonio

  dba UT Health San Antonio Multispecialty & Research Hospital

  • General Acute Care Hospital
  • San Antonio, TX
  • NPI 1326829904
  NPD
• University of Texas Health Science Center at San Antonio

  dba UTHSCSA Rehab Medicine

  • Prosthetic/Orthotic Supplier
  • San Antonio, TX
  • NPI 1538224142
  NPD (past)

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

{
    "created_epoch": "1367884800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755129600000",
    "number": "1205271095",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4502 MEDICAL DR",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782294402",
            "telephone_number": "210-358-4000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4502 MEDICAL DR",
            "city": "SAN ANTONIO",
            "state": "TX",
            "postal_code": "782294402",
            "telephone_number": "210-358-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ARMAIZ-PENA",
        "first_name": "GUSTAVO",
        "middle_name": "R.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2013-05-07",
        "last_updated": "2025-08-14",
        "certification_date": "2025-08-14",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "TX",
            "license": "S1976",
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "TX",
            "license": "S1976",
            "primary": false
        },
        {
            "code": "207RE0101X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": "TX",
            "license": "S1976",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "400097801",
            "state": "TX"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CSHCN",
            "identifier": "400097802",
            "state": "TX"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Straight Line Arla, MD
• Maranda S Arline
• Arm Associates LP
• Arm Associates LP
• Armada Medical Supplier, LLC
• Aristides Jose Armas Villalba, MD
• Korynn Elise Armendarez
• Larisa Armendarez
• Armendariz Counseling Incorporated
• Eliana Vargas Armendariz, LVN

• Endocrinology, Diabetes & Metabolism Physician in San Antonio, TX
• Providers in San Antonio, TX by specialty
• Endocrinology, Diabetes & Metabolism Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 14, 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.