Michael Dathan Chesnut, M.D.
NPI 1821127333ActiveIndividual· Internal Medicine· Prospect, KY
Internal Medicine (M.D.) in Prospect, Kentucky, trained at University of Louisville School of Medicine (class of 2004). Their prescriptions cost Medicare Part D more than their services did: $767,110 for 6,764 claims, against $57,861 paid for services in 2024. Phathom Pharmaceuticals, Inc. was the largest of 18 companies reporting payments in 2025, $866.20 in all, mostly food and beverage.
Overview
| NPI | 1821127333 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Mar 2, 2007 |
| Last updated in NPPES | Dec 3, 2021 |
| Certified by provider | Dec 3, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 40644 | KY |
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 (KY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 191 |
|---|---|
| Services billed | 1,782 across 52 procedure codes |
| Paid by Medicare | $57,861 |
Part D prescriptions in 2024
| Prescriptions (claims) | 6,764 · 13,874 30-day fills |
|---|---|
| Patients | 335 |
| Total drug cost | $767,110 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | University of Louisville School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Internal Medicine |
Medical group
- Greater Louisville Internal Medicine PSCProspect, KY · 8 clinicians
Hospital affiliations
- Baptist Health LagrangeLa Grange, KY
- Baptist Health LouisvilleLouisville, KY
- Norton Hospitals, IncLouisville, KY
- Uofl Health - Jewish Hospital and Mary & Elizabeth HospitalLouisville, KY
Industry payments (Open Payments)
- 2025$866.20 · 42 payments from 18 companies
- 2024$1,131 · 64 payments from 16 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Phathom Pharmaceuticals, Inc. | $159.46 | 3 |
| Abbvie Inc. | $137.27 | 7 |
| Novo Nordisk Inc | $124.42 | 8 |
| Amgen Inc. | $85.15 | 5 |
| Axsome Therapeutics, Inc. | $41.28 | 2 |
What the 2025 payments were for
- Food and Beverage$866.20 · 42 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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