Nathan Eric Schrock, MD
NPI 1679573372ActiveIndividual· Internal Medicine, Hematology & Oncology· Knoxville, TN
Internal Medicine, Hematology & Oncology (MD) in Knoxville, Tennessee, trained at University of Mississippi School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $3,787,772 for 1,071 claims, against $50,241 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 42 companies reporting payments in 2025, $5,353 in all, mostly food and beverage.
Overview
| NPI | 1679573372 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 26, 2005 |
| Last updated in NPPES | Apr 1, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | MD0000037305 | TN |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 37971 | KY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (TN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 329 |
|---|---|
| Services billed | 689 across 13 procedure codes |
| Paid by Medicare | $50,241 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,071 · 1,509 30-day fills |
|---|---|
| Patients | 228 |
| Total drug cost | $3,787,772 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | University of Mississippi School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Hematology/Oncology |
Medical group
- University Health System, Inc.Knoxville, TN · 522 clinicians
Hospital affiliations
- Blount Memorial HospitalMaryville, TN
- University Health System, IncKnoxville, TN
Industry payments (Open Payments)
- 2025$5,353 · 238 payments from 42 companies
- 2024$4,731 · 229 payments from 40 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $585.77 | 22 |
| Novartis Pharmaceuticals Corporation | $381.74 | 18 |
| Janssen Biotech, Inc. | $373.75 | 17 |
| E.R. Squibb & Sons, L.L.C. | $369.07 | 26 |
| Daiichi Sankyo Inc. | $299.37 | 10 |
What the 2025 payments were for
- Food and Beverage$5,049 · 234 payments
- Education$303.97 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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