Warren Bradley Fields, M.D.
NPI 1225158694ActiveIndividual· Internal Medicine, Pulmonary Disease· Royal Oak, MI
Internal Medicine, Pulmonary Disease (M.D.) in Royal Oak, Michigan, trained at Indiana University School of Medicine (class of 2000). Their prescriptions cost Medicare Part D more than their services did: $884,157 for 2,248 claims, against $194,758 paid for services in 2024. Glaxosmithkline, LLC. was the largest of 19 companies reporting payments in 2025, $2,390 in all, mostly food and beverage.
Overview
| NPI | 1225158694 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 30, 2007 |
| Last updated in NPPES | Sep 12, 2024 |
| Certified by provider | Sep 12, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | 4301076558 | MI |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 4301076558 | MI |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 036121035 | IL |
| Internal Medicine, Pulmonary Disease | 207RP1001X | 036121035 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 570 |
|---|---|
| Services billed | 2,708 across 30 procedure codes |
| Paid by Medicare | $194,758 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,248 · 3,123 30-day fills |
|---|---|
| Patients | 366 |
| Total drug cost | $884,157 |
| Generic share | 52% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 2000 |
| Medicare specialty | Pulmonary Disease |
| Secondary specialties | Critical Care (Intensivists) |
Medical groups
- Beaumont Medical Group- Specialty ServicesBerkley, MI · 847 clinicians
- Greenberger Wu Dunn and Fields PLLCRoyal Oak, MI · 4 clinicians
Hospital affiliations
- Beaumont Hospital - Farmington HillsFarmington Hills, MI
- Beaumont Hospital - Grosse PointeGrosse Pointe, MI
- Beaumont Hospital Royal OakRoyal Oak, MI
- Beaumont Hospital, TroyTroy, MI
Industry payments (Open Payments)
- 2025$2,390 · 143 payments from 19 companies
- 2024$1,349 · 68 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Glaxosmithkline, LLC. | $373.26 | 27 |
| Verona Pharma, Inc. | $349.57 | 24 |
| Astrazeneca Pharmaceuticals LP | $207.97 | 10 |
| Insmed, Inc. | $205.63 | 15 |
| Philips North America LLC | $172.03 | 19 |
What the 2025 payments were for
- Food and Beverage$2,390 · 143 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Pulmonary Disease providers in Royal Oak
- 1063863850
- 1306625165
- 1134178957
- 1942493838
- 1548239023
- 1356462279
- 1699971713
- 1144596883
- 1477701878
- 1467147009
- 1033736293
- 1427002484
All Internal Medicine, Pulmonary Disease providers in Michigan →