Quick answers
- Which hospitals does Mark A. Desilva work at?
- Medicare's official clinician data lists Mark A. Desilva at 1 hospital: Advocate Trinity Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Mark A. Desilva see patients?
- Medicare's clinician data lists 1 practice location in Oak Lawn, IL. Call before your visit to confirm the address.
- What is Mark A. Desilva's specialty?
- Medicare lists Emergency Medicine as the primary specialty.
- Does Mark A. Desilva accept Medicare assignment?
- Yes. Medicare's clinician data says Mark A. Desilva accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of 2026-10-02. Ask the office to confirm before your visit.
- What is the phone number for Mark A. Desilva?
- (708) 684-4393, as listed in official Medicare / NPI Registry data.
- What is Mark A. Desilva's NPI number?
- 1609945922. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Mark A. Desilva works
Medicare's Facility Affiliation Data lists Mark A. Desilva at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · CCN 140048
Practice locations
Addresses where Mark A. Desilva is enrolled with Medicare (CMS data updated 2026-10-02).
- 4440 W 95th StOak Lawn, IL 60453 (708) 684‑4393
Group practices
Medicare enrollment lists Mark A. Desilva as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Emergency Medicineprimary
Other emergency medicine doctors in Oak Lawn
Clinicians with the same Medicare primary specialty in Oak Lawn, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Rush Medical College Of Rush University |
| Graduation year | 1987 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1609945922 |
| 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 2026-10-02, retrieved 2026-10-29
- National Downloadable File (Doctors and Clinicians) — CMS, data updated 2026-10-02, retrieved 2026-10-29
- 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