Zachary Walker Tilley, MD
NPI 1144726993ActiveIndividual· Internal Medicine· Little Rock, AR
Internal Medicine (MD) in Little Rock, Arkansas, trained at University of Arkansas College of Medicine (class of 2018). In 2024 Medicare paid $67,929 for 284 patients, and Part D covered 305 of their prescriptions, 83% of them generic. Abiomed reported $27.81 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1144726993 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Apr 2, 2018 |
| Last updated in NPPES | Aug 5, 2021 |
| Certified by provider | Aug 5, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | E-14274 | AR |
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 - Hospitalist (AR) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 284 |
|---|---|
| Services billed | 899 across 10 procedure codes |
| Paid by Medicare | $67,929 |
Part D prescriptions in 2024
| Prescriptions (claims) | 305 · 387 30-day fills |
|---|---|
| Patients | 121 |
| Total drug cost | $31,597 |
| Generic share | 83% of claims |
Education and affiliations
| Medical school | University of Arkansas College of Medicine |
|---|---|
| Graduation year | 2018 |
| Medicare specialty | Hospitalist |
| Secondary specialties | Internal Medicine |
Medical group
- St Vincent Medical GroupLittle Rock, AR · 240 clinicians
Industry payments (Open Payments)
- 2025$27.81 · 1 payment from 1 company
- 2024$62.22 · 3 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $27.81 | 1 |
What the 2025 payments were for
- Food and Beverage$27.81 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 251 internal medicine physicians in Little Rock · All internal medicine physicians in Arkansas