Ronald Hamrick Jr., MD
NPI 1447542162ActiveIndividual· Dermatology· Milwaukee, WI
Dermatology (MD) in Milwaukee, Wisconsin, trained at Indiana University School of Medicine (class of 2011). Their prescriptions cost Medicare Part D more than their services did: $210,362 for 288 claims, against $35,637 paid for services in 2024. Abbvie Inc. was the largest of 10 companies reporting payments in 2025, $422.77 in all, mostly food and beverage.
Overview
| NPI | 1447542162 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 12, 2011 |
| Last updated in NPPES | Nov 5, 2020 |
| Certified by provider | Nov 5, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 74215 | WI |
| Internal Medicine | 207R00000X | 54105 | TN |
| Dermatology | 207N00000X | MD54105 | TN |
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 - Dermatology (TN); Practitioner - Dermatology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 175 |
|---|---|
| Services billed | 631 across 53 procedure codes |
| Paid by Medicare | $35,637 |
Part D prescriptions in 2024
| Prescriptions (claims) | 288 · 339 30-day fills |
|---|---|
| Patients | 100 |
| Total drug cost | $210,362 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 2011 |
| Medicare specialty | Dermatology |
| Secondary specialties | Internal Medicine |
Medical groups
- University Health System, Inc.Knoxville, TN · 522 clinicians
- University of TennesseeKnoxville, TN · 64 clinicians
Hospital affiliation
- University Health System, IncKnoxville, TN
Industry payments (Open Payments)
- 2025$422.77 · 19 payments from 10 companies
- 2024$639.25 · 29 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $113.74 | 5 |
| Zoll Services LLC (A/K/A Zoll Lifecor Corp) | $64.26 | 4 |
| Mallinckrodt Hospital Products Inc. | $54.00 | 2 |
| Kyowa Kirin, Inc. | $51.87 | 2 |
| Janssen Biotech, Inc. | $24.99 | 1 |
What the 2025 payments were for
- Food and Beverage$399.27 · 18 payments
- Education$23.50 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 45 dermatologists in Milwaukee · All dermatologists in Wisconsin