Quick answers
- Which hospitals does Gabriel E. Marrero Rivera work at?
- Medicare's official clinician data lists Gabriel E. Marrero Rivera at 1 hospital: University of Illinois Hospital and Clinics. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Gabriel E. Marrero Rivera see patients?
- Medicare's clinician data lists 2 practice locations, including Chicago, IL. Call before your visit to confirm the address.
- What is Gabriel E. Marrero Rivera's specialty?
- Medicare lists Gastroenterology as the primary specialty.
- Does Gabriel E. Marrero Rivera accept Medicare assignment?
- Yes. Medicare's clinician data says Gabriel E. Marrero Rivera 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 Gabriel E. Marrero Rivera?
- (312) 355-4300, as listed in official Medicare / NPI Registry data.
- What is Gabriel E. Marrero Rivera's NPI number?
- 1447707229. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Gabriel E. Marrero Rivera works
Medicare's Facility Affiliation Data lists Gabriel E. Marrero Rivera at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- University of Illinois Hospital and ClinicsChicago, IL · Acute Care Hospital · CCN 140150
Practice locations
Addresses where Gabriel E. Marrero Rivera is enrolled with Medicare (CMS data updated 2026-10-02).
- 1009 S Wood StChicago, IL 60612 (312) 355‑4300
- 1740 W Taylor St, Mc931Chicago, IL 60612 (312) 355‑5258
Group practices
Medicare enrollment lists Gabriel E. Marrero Rivera as a member of this group (CMS data updated 2026-10-02).
- The Board of Trustees of the University of Illinois1,150 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Chicago
Clinicians with the same Medicare primary specialty in Chicago, IL — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Puerto Rico School Of Medicine |
| Graduation year | 2017 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1447707229 |
| 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