Quick answers
- Does Youssef J. Shammaa accept Medicare assignment?
- Yes. Medicare's clinician data says Youssef J. Shammaa 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 Youssef J. Shammaa's NPI number?
- 1528582517. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Youssef J. Shammaa works
Medicare's Facility Affiliation Data lists Youssef J. Shammaa 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.
- Clay County HospitalFlora, IL · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 141351
- Deaconess Illinois CrossroadsMount Vernon, IL · Acute Care Hospital · Emergency services: listed by Medicare · CCN 140294
- Good Samaritan Regional Health CenterMount Vernon, IL · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 140046
- SSM Health St Mary's Hospital -CentraliaCentralia, IL · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 140034
- Washington County HospitalNashville, IL · Critical Access Hospital · Emergency services: listed by Medicare · CCN 141308
Practice locations
Addresses where Youssef J. Shammaa is enrolled with Medicare (CMS data updated October 2, 2026).
- 2 Good Samaritan Way, Suite 420Mount Vernon, IL 62864 (618) 899‑4000
Group practices
Medicare enrollment lists Youssef J. Shammaa as a member of this group (CMS data updated October 2, 2026).
- Physician Services Corporation of Southern Illinois Inc120 clinicians in the group
Specialties
- Pulmonary Diseaseprimary
- Sleep Medicinealso
Other pulmonologists in Mount Vernon
Clinicians with the same Medicare primary specialty in Mount Vernon, IL — not a recommendation.
Other clinicians in Physician Services Corporation of Southern Illinois Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Graduation year | 2016 (10 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1528582517 |
| 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