Abbas Mehdi Sizar, MD

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

W0731 Issued in TX

Practice address

4502 Medical Dr
San Antonio, TX 78229-4492

Phone

(210) 358-4000

NPI assigned

Mar 27, 2023

Last updated

Aug 25, 2025By the provider in NPPES

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

Emergency Medicine

Education

Other, 2023

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Prestige Emergency Consultants LLCGroup PAC ID 5991135386, 11 clinicians

Concord Medical Group of Texas PLLCGroup PAC ID 7810117223, 319 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• El Campo Memorial Hospital Hospital, El Campo, TX, CCN 450694
• Otto Kaiser Memorial Hospital Hospital, Kenedy, TX, CCN 451364

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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

• Concord Medical Group of Texas PLLC

  • Emergency Medicine Physician
  • Lubbock, TX
  • NPI 1750790762
  Medicare reassignment Care Compare group NPD
• Prestige Emergency Consultants LLC

  • Emergency Medicine Physician
  • San Antonio, TX
  • NPI 1730637778
  Medicare reassignment Care Compare group
• Concord Medical Group PLLC

  • Emergency Medicine Physician
  • Lubbock, TX
  • NPI 1083630610
  Medicare reassignment NPD
• Alamo Heights Ers Acquisition Partners LLC

  dba The Emergency Clinic at Alamo Heights

  • Emergency Care Clinic/Center
  • San Antonio, TX
  • NPI 1518752302
  NPD (past)
• Cec Alamo Heights ER Physicians PLLC

  • Emergency Medical Services (Emergency Medicine) Physician
  • San Antonio, TX
  • NPI 1194117374
  NPD (past)
• Cec City Base ER Physicians PLLC

  • Emergency Medical Services (Emergency Medicine) Physician
  • San Antonio, TX
  • NPI 1578934881
  NPD (past)
• Cec la Vernia ER Physicians PLLC

  • Emergency Medical Services (Emergency Medicine) Physician
  • La Vernia, TX
  • NPI 1487027488
  NPD (past)

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• El Campo Memorial Hospital

  dba Mid Coast Medical Clinic - Trinity

  • General Acute Care Hospital
  • El Campo, TX
  • NPI 1003192311
  Care Compare affiliation
• Karnes County Hospital District

  dba Otto Kaiser Memorial Hospital

  • Critical Access Hospital
  • Kenedy, TX
  • NPI 1699772541
  Care Compare affiliation

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

{
    "created_epoch": "1679875200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1756080000000",
    "number": "1497458624",
    "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": "782294492",
            "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": "782294492",
            "telephone_number": "210-358-4000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIZAR",
        "first_name": "ABBAS",
        "middle_name": "MEHDI",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-03-27",
        "last_updated": "2025-08-25",
        "certification_date": "2025-08-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "TX",
            "license": "W0731",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Scott K Sitterle, O.D.
• Blair Frances Sivess
• Six Lac Inc (Care Home Services)
• Sixrsig LLC (Aspen Hospice and Palliative Care)
• Sixrsig LLC (San Antonio Home Health)
• Sizewise Rentals LLC
• Sjel Diagnostics of Austin, PLLC
• Shelby Skaarer
• Alexa Maria Skaggs
• Nathan J Skaggs

• Emergency Medicine Physician in San Antonio, TX
• Providers in San Antonio, TX by specialty
• Emergency Medicine Physician in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Aug 25, 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.