Quick answers
- Does Donald J. Siwek accept Medicare assignment?
- Yes. Medicare's clinician data says Donald J. Siwek accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- What is Donald J. Siwek's NPI number?
- 1760439053. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Donald J. Siwek works
Medicare's Facility Affiliation Data lists Donald J. Siwek at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Baylor Medical Center at Trophy ClubTrophy Club, TX · Acute Care Hospital · Emergency services: listed by Medicare · CCN 450883
- Methodist Southlake Medical CenterSouthlake, TX · Acute Care Hospital · Emergency services: listed by Medicare · CCN 670132
Practice locations
Addresses where Donald J. Siwek is enrolled with Medicare (CMS data updated October 2, 2026).
- 14850 Quorum Dr, Suite 400Dallas, TX 75254 (469) 437‑3564
Group practices
Medicare enrollment lists Donald J. Siwek as a member of this group (CMS data updated October 2, 2026).
- Valiant Anesthesia Associates, PLLC57 clinicians in the group
Specialties
- Anesthesiologyprimary
Other anesthesiologists in Dallas
Clinicians with the same Medicare primary specialty in Dallas, TX — not a recommendation.
Other clinicians in Valiant Anesthesia Associates, PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1993 (33 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1760439053 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians