Quick answers
- Which hospitals does David S. Looyenga work at?
- Medicare's official clinician data lists David S. Looyenga at 2 hospitals: Advocate Christ Hospital & Medical Center and Advocate Trinity Hospital. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does David S. Looyenga see patients?
- Medicare's clinician data lists 3 practice locations, including Hazel Crest, IL, Tinley Park, IL and Buffalo Grove, IL. Call before your visit to confirm the address.
- What is David S. Looyenga's specialty?
- Medicare lists Cardiovascular Disease (Cardiology) as the primary specialty, and also Internal Medicine.
- Does David S. Looyenga accept Medicare assignment?
- Yes. Medicare's clinician data says David S. Looyenga 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 David S. Looyenga?
- (708) 575-4415, as listed in official Medicare / NPI Registry data.
- What is David S. Looyenga's NPI number?
- 1801850904. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where David S. Looyenga works
Medicare's Facility Affiliation Data lists David S. Looyenga 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
- Advocate Trinity HospitalChicago, IL · Acute Care Hospital · CCN 140048
Practice locations
Addresses where David S. Looyenga is enrolled with Medicare (CMS data updated 2026-10-02).
- 17850 Kedzie Ave, Suite 3500Hazel Crest, IL 60429 (708) 575‑4415
- 18210 S Lagrange Rd, 200 Advocate Med GroupTinley Park, IL 60487 (708) 479‑6636
- 214 McHenry RdBuffalo Grove, IL 60089 (847) 459‑1160
Group practices
Medicare enrollment lists David S. Looyenga as a member of this group (CMS data updated 2026-10-02).
- Advocate Health and Hospitals Corporation3,118 clinicians in the group
Specialties
Find other Cardiovascular Disease (Cardiology) doctors in Illinois →
Other cardiologists in Hazel Crest
Clinicians with the same Medicare primary specialty in Hazel Crest, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Wayne State University School Of Medicine |
| Graduation year | 1982 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1801850904 |
| 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