Quick answers
- Which hospitals does Oscar Ruiz work at?
- Medicare's official clinician data lists Oscar Ruiz at 1 hospital: Advocate Christ Hospital & Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Oscar Ruiz see patients?
- Medicare's clinician data lists 3 practice locations, including Buffalo Grove, IL, Oak Lawn, IL and Burbank, IL. Call before your visit to confirm the address.
- What is Oscar Ruiz's specialty?
- Medicare lists Family Practice as the primary specialty, and also Pediatric Medicine.
- Does Oscar Ruiz accept Medicare assignment?
- Yes. Medicare's clinician data says Oscar Ruiz 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 Oscar Ruiz?
- (847) 459-1160, as listed in official Medicare / NPI Registry data.
- What is Oscar Ruiz's NPI number?
- 1427046648. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Oscar Ruiz works
Medicare's Facility Affiliation Data lists Oscar Ruiz at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Advocate Christ Hospital & Medical CenterOak Lawn, IL · Acute Care Hospital · CCN 140208
Practice locations
Addresses where Oscar Ruiz is enrolled with Medicare (CMS data updated 2026-10-02).
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
- 4440 W 95th StOak Lawn, IL 60453
- 6345 W 79th StBurbank, IL 60459 (708) 499‑1545
Group practices
Medicare enrollment lists Oscar Ruiz as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
- Family Practiceprimary
- Pediatric Medicinealso
Other family doctors in Buffalo Grove
Clinicians with the same Medicare primary specialty in Buffalo Grove, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Illinois College Of Med (chi/peor/rock/chm-Urb) |
| Graduation year | 2002 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1427046648 |
| 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