Derek Rainwater, MD
NPI 1548767437ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Bossier City, LA
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) in Bossier City, Louisiana, trained at Louisiana State University School of Medicine in Shreveport (class of 2018). Their prescriptions cost Medicare Part D more than their services did: $922,123 for 1,370 claims, against $54,501 paid for services in 2024. Novo Nordisk Inc was the largest of 19 companies reporting payments in 2025, $1,212 in all, mostly food and beverage.
Overview
| NPI | 1548767437 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 9, 2018 |
| Last updated in NPPES | Jan 30, 2026 |
| Certified by provider | Jan 30, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 324395 | LA |
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 - General Practice (LA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 161 |
|---|---|
| Services billed | 763 across 13 procedure codes |
| Paid by Medicare | $54,501 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,370 · 2,446 30-day fills |
|---|---|
| Patients | 161 |
| Total drug cost | $922,123 |
| Generic share | 23% of claims |
Education and affiliations
| Medical school | Louisiana State University School of Medicine in Shreveport |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | General Practice |
| Telehealth | Offers telehealth |
Hospital affiliations
- Natchitoches Regional Medical CenterNatchitoches, LA
- Willis Knighton Medical CenterShreveport, LA
Industry payments (Open Payments)
- 2025$1,212 · 56 payments from 19 companies
- 2024$2,393 · 59 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $233.13 | 9 |
| Corcept Therapeutics | $147.33 | 7 |
| Bayer Healthcare Pharmaceuticals Inc. | $146.28 | 7 |
| Lilly USA, LLC | $105.99 | 5 |
| Amgen Inc. | $103.44 | 5 |
What the 2025 payments were for
- Food and Beverage$1,212 · 56 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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