Dorrie C. Tredway, MD
NPI 1891787040ActiveIndividual· Family Medicine· O Fallon, IL
Family Medicine (MD) in O Fallon, Illinois, trained at Rush Medical College of Rush University (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $431,578 for 2,860 claims, against $44,187 paid for services in 2024. Pfizer Inc. was the largest of 3 companies reporting payments in 2025, $81.70 in all, mostly food and beverage.
Overview
| NPI | 1891787040 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 15, 2005 |
| Last updated in NPPES | Dec 20, 2021 |
| Certified by provider | Dec 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036108951 | IL |
| Family Medicine | 207Q00000X | 2008010712 | MO |
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 | 164 |
|---|---|
| Services billed | 640 across 44 procedure codes |
| Paid by Medicare | $44,187 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,860 · 6,732 30-day fills |
|---|---|
| Patients | 211 |
| Total drug cost | $431,578 |
| Generic share | 81% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Family Practice |
Medical group
- Hshs Medical Group IncO Fallon, IL · 219 clinicians
Hospital affiliations
- Hshs St Elizabeth's HospitalO Fallon, IL
- Memorial HospitalBelleville, IL
- St Johns HospitalSpringfield, IL
Other facilities
- Hshs Home Care IllinoisHome health agency · Effingham, IL
Industry payments (Open Payments)
- 2025$81.70 · 4 payments from 3 companies
- 2024$166.29 · 8 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $38.32 | 2 |
| Amgen Inc. | $22.47 | 1 |
| Abbvie Inc. | $20.91 | 1 |
What the 2025 payments were for
- Food and Beverage$81.70 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 45 family medicine physicians in O Fallon · All family medicine physicians in Illinois