Quick answers
- Does Abbas M. Sizar accept Medicare assignment?
- Yes. Medicare's clinician data says Abbas M. Sizar 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 Abbas M. Sizar's NPI number?
- 1497458624. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Abbas M. Sizar works
Medicare's Facility Affiliation Data lists Abbas M. Sizar 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.
- El Campo Memorial HospitalEl Campo, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 450694
Practice locations
Addresses where Abbas M. Sizar is enrolled with Medicare (CMS data updated October 2, 2026).
- 2810 N Loop 1604, Suite 110San Antonio, TX 78248 (210) 504‑4837
- 3349 S Hwy 181Kenedy, TX 78119 (830) 583‑3401
Group practices
Medicare enrollment lists Abbas M. Sizar as a member of these groups (CMS data updated October 2, 2026).
- Concord Medical Group of Texas PLLC321 clinicians in the group
- Prestige Emergency Consultants LLC11 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in San Antonio
Clinicians with the same Medicare primary specialty in San Antonio, TX — not a recommendation.
Other clinicians in Concord Medical Group of Texas PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2023 (3 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1497458624 |
| 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