Steven Siemieniak, DO

Primary specialty

Emergency Medicine PhysicianTaxonomy code 207P00000X

License

0102207565 Issued in VA

Practice address

1100 Wilford Hall Loop # 4554
Jbsa Lackland, TX 78236-5638

Phone

(210) 292-7412

NPI assigned

Feb 22, 2021

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

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, 2021

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Emergency Medicine Services of TX, PLLCGroup PAC ID 3375909351, 374 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Methodist Hospital Hospital, San Antonio, TX, CCN 450388
• Methodist Hospital Stone Oak Hospital, San Antonio, TX, CCN 670055

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Osteopathy

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.

• Emergency Medicine Services of TX, PLLC

  • Emergency Medicine Physician
  • San Antonio, TX
  • NPI 1245938729
  Medicare reassignment Care Compare group NPD

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

• Methodist Healthcare System of San Antonio LTD LLP

  • General Acute Care Hospital
  • San Antonio, TX
  • NPI 1659525236
  Care Compare affiliation
• Methodist Healthcare System of San Antonio, LTD., L.L.P.

  • General Acute Care Hospital
  • San Antonio, TX
  • NPI 1124074273
  Care Compare affiliation
• Methodist Healthcare System of San Antonio, LTD., L.L.P.

  • General Acute Care Hospital
  • San Antonio, TX
  • NPI 1689627655
  Care Compare affiliation
• Methodist Healthcare System of San Antonio, LTD., L.L.P.

  • General Acute Care Hospital
  • San Antonio, TX
  • NPI 1952348021
  Care Compare affiliation

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

{
    "created_epoch": "1613952000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782432000000",
    "number": "1659965598",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1100 WILFORD HALL LOOP # 4554",
            "city": "JBSA LACKLAND",
            "state": "TX",
            "postal_code": "782365638",
            "telephone_number": "210-292-7412"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1100 WILFORD HALL LOOP # 4554",
            "city": "JBSA LACKLAND",
            "state": "TX",
            "postal_code": "782365638",
            "telephone_number": "210-292-7412"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3551 Roger Brooke Dr",
            "address_purpose": "LOCATION",
            "city": "Jbsa Ft Sam Houston",
            "state": "TX",
            "postal_code": "782344504",
            "country_code": "US",
            "telephone_number": "210-916-3400",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "SIEMIENIAK",
        "first_name": "STEVEN",
        "credential": "DO",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-02-22",
        "last_updated": "2026-06-26",
        "certification_date": "2026-06-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "VA",
            "license": "0102207565",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Ryan Richard Sheridan, D.M.D
• Paul Michael Sherman, M.D.
• James E Shields, PT, DPT, OCS
• Evan Shipp
• Mark Sidransky, DDS
• Dustin Simpson, M.D.
• Kathryn C Simpson, MD
• Derek John Skousen, DDS
• Aileen Smith
• Derek Smith, M.D.

• Emergency Medicine Physician in Jbsa Lackland, TX
• Providers in Jbsa Lackland, 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 Jun 26, 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.