John T. Fiedler, M.D.
NPI 1487623716ActiveIndividual· Internal Medicine· Elgin, IL
Internal Medicine (M.D.) in Elgin, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1993). Their prescriptions cost Medicare Part D more than their services did: $571,896 for 7,425 claims, against $265,322 paid for services in 2024. Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $161.23 in all, mostly food and beverage.
Overview
| NPI | 1487623716 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 17, 2006 |
| Last updated in NPPES | Aug 7, 2023 |
| Certified by provider | Aug 7, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036095731 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 376 |
|---|---|
| Services billed | 12,317 across 78 procedure codes |
| Paid by Medicare | $265,322 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,425 · 18,509 30-day fills |
|---|---|
| Patients | 547 |
| Total drug cost | $571,896 |
| Generic share | 87% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Internal Medicine |
Medical group
- Dupage Medical Group LtdWinfield, IL · 1,322 clinicians
Hospital affiliations
- Advocate Good Shepherd HospitalBarrington, IL
- Advocate Sherman HospitalElgin, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine McHenryMcHenry, IL
- Saint Joseph Hospital-ElginElgin, IL
Other facilities
- Advocate Home Health Care ServHome health agency · Oakbrook, IL
- Astra Health WestHome health agency · Elgin, IL
- Safe Life Home Health Care, LLCHome health agency · Lombard, IL
- Suncrest Hospice Illinois LLCHospice · Northbrook, IL
Industry payments (Open Payments)
- 2025$161.23 · 6 payments from 4 companies
- 2024$695.21 · 29 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $59.75 | 2 |
| Janssen Pharmaceuticals, Inc | $53.68 | 2 |
| Boston Scientific Corporation | $33.21 | 1 |
| Exact Sciences Corporation | $14.59 | 1 |
What the 2025 payments were for
- Food and Beverage$161.23 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 85 internal medicine physicians in Elgin · All internal medicine physicians in Illinois