Larry C. Buck II, DO
NPI 1851749139ActiveIndividual· Internal Medicine· Ferguson, MO
Internal Medicine (DO) in Ferguson, Missouri, licensed in MO, with an NPI issued in May 2016. Their prescriptions cost Medicare Part D more than their services did: $586,964 for 7,204 claims, against $21,855 paid for services in 2024. Exact Sciences Corporation was the largest of 6 companies reporting payments in 2025, $195.27 in all, mostly food and beverage.
Overview
| NPI | 1851749139 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | May 27, 2016 |
| Last updated in NPPES | Sep 24, 2025 |
| Certified by provider | Sep 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 2019024147 | 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 - Internal Medicine (MO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 56 |
|---|---|
| Services billed | 678 across 50 procedure codes |
| Paid by Medicare | $21,855 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,204 · 16,669 30-day fills |
|---|---|
| Patients | 504 |
| Total drug cost | $586,964 |
| Generic share | 89% of claims |
Industry payments (Open Payments)
- 2025$195.27 · 9 payments from 6 companies
- 2024$326.93 · 15 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $68.08 | 3 |
| Lilly USA, LLC | $42.40 | 2 |
| E.R. Squibb & Sons, L.L.C. | $31.95 | 1 |
| Novo Nordisk Inc | $22.77 | 1 |
| Astrazeneca Pharmaceuticals LP | $15.32 | 1 |
What the 2025 payments were for
- Food and Beverage$195.27 · 9 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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