Quick answers
- Which hospitals does Ryan J. Tremb work at?
- Medicare's official clinician data lists Ryan J. Tremb at 5 hospitals: Morris Hospital & Healthcare Centers, OSF Saint Elizabeth MDL Ctr, OSF Saint Katharine Medical Center, OSF Saint Paul Medical Center and Saint Francis Medical Center. This is where the clinician works or has privileges; call the hospital to confirm.
- Where does Ryan J. Tremb see patients?
- Medicare's clinician data lists 7 practice locations, including Ottawa, IL and Peoria, IL. Call before your visit to confirm the address.
- What is Ryan J. Tremb's specialty?
- Medicare lists Family Practice as the primary specialty.
- Does Ryan J. Tremb accept Medicare assignment?
- Yes. Medicare's clinician data says Ryan J. Tremb 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 Ryan J. Tremb?
- (815) 433-3100, as listed in official Medicare / NPI Registry data.
- What is Ryan J. Tremb's NPI number?
- 1568638989. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Hospitals where Ryan J. Tremb works
Medicare's Facility Affiliation Data lists Ryan J. Tremb at these hospitals (updated 2026-10-02). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians.
- Morris Hospital & Healthcare CentersMorris, IL · Acute Care Hospital · CCN 140101
- OSF Saint Elizabeth MDL CtrPeru, IL · Acute Care Hospital · CCN 140110
- OSF Saint Katharine Medical CenterDixon, IL · Acute Care Hospital · CCN 140012
- OSF Saint Paul Medical CenterMendota, IL · Critical Access Hospital · CCN 141310
- Saint Francis Medical CenterPeoria, IL · Acute Care Hospital · CCN 140067
Practice locations
Addresses where Ryan J. Tremb is enrolled with Medicare (CMS data updated 2026-10-02). The first 5 of 7; the Medicare profile lists all.
- 1100 E Norris DrOttawa, IL 61350 (815) 433‑3100
- 124 SW Adams StPeoria, IL 61602
- 1614 E Norris DrOttawa, IL 61350 (815) 433‑1010
- 1614 E Norris Dr, Obgyn and Anti CoagOttawa, IL 61350 (815) 431‑0435
- 1614 E Norris Dr, OSF Healthcare Medical Group OttawaOttawa, IL 61350 (815) 433‑1010
Group practices
Medicare enrollment lists Ryan J. Tremb as a member of these groups (CMS data updated 2026-10-02).
- OSF Multi-Specialty Group2,114 clinicians in the group
- Ottawa Regional Hospital and Healthcare Center47 clinicians in the group
Specialties
- Family Practiceprimary
Other family doctors in Ottawa
Clinicians with the same Medicare primary specialty in Ottawa, IL — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Graduation year | 2005 |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1568638989 |
| 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