Ryan Joseph Tremb, D.O.
NPI 1568638989ActiveIndividual· Family Medicine· Ottawa, IL
Family Medicine (D.O.) with Osf Multi-Specialty Group and 1 other group, practicing in Ottawa, Illinois. Their prescriptions cost Medicare Part D more than their services did: $530,959 for 8,397 claims, against $13,219 paid for services in 2024. Astrazeneca Pharmaceuticals LP reported $551.83 in payments in 2025, mostly food and beverage. Lists Morris Hospital & Healthcare Centers and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1568638989 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | D.O. |
| Sole proprietor | No |
| NPI issued | May 6, 2008 |
| Last updated in NPPES | Oct 23, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036119146 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Family Practice (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 300 |
|---|---|
| Services billed | 1,884 across 9 procedure codes |
| Paid by Medicare | $13,219 |
Part D prescriptions in 2024
| Prescriptions (claims) | 8,397 · 14,984 30-day fills |
|---|---|
| Patients | 528 |
| Total drug cost | $530,959 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Family Practice |
Medical groups
- Osf Multi-Specialty GroupMorton, IL · 2,114 clinicians
- Ottawa Regional Hospital and Healthcare CenterOttawa, IL · 47 clinicians
Hospital affiliations
- Morris Hospital & Healthcare CentersMorris, IL
- Osf Saint Elizabeth Mdl CtrPeru, IL
- Osf Saint Katharine Medical CenterDixon, IL
- Osf Saint Paul Medical CenterMendota, IL
- Saint Francis Medical CenterPeoria, IL
Other facilities
- Osf Healthcare Home CareHome health agency · Loves Park, IL
Industry payments (Open Payments)
- 2025$551.83 · 7 payments from 1 company
- 2024$1,084 · 12 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $551.83 | 7 |
What the 2025 payments were for
- Food and Beverage$551.83 · 7 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 family medicine physicians in Ottawa · All family medicine physicians in Illinois