Hans Joerg Hammers, M.D., PH.D.
NPI 1851437909ActiveIndividual· Internal Medicine, Medical Oncology· Dallas, TX
Internal Medicine, Medical Oncology (M.D., PH.D.) with University of Texas Southwestern Medical Center at Dallas, practicing in Dallas, Texas. Their prescriptions cost Medicare Part D more than their services did: $7,020,463 for 676 claims, against $40,928 paid for services in 2024. Eisai Inc. was the largest of 3 companies reporting payments in 2025, $5,397 in all, mostly consulting fees. Lists Ut of Texas Southwestern University Hospital - William P. Clements Jr. as a hospital affiliation.
Overview
| NPI | 1851437909 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D., PH.D. |
| Sole proprietor | No |
| NPI issued | Jan 29, 2007 |
| Last updated in NPPES | Nov 10, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | Q9626 | TX |
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 - Medical Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 124 |
|---|---|
| Services billed | 351 across 5 procedure codes |
| Paid by Medicare | $40,928 |
Part D prescriptions in 2024
| Prescriptions (claims) | 676 · 815 30-day fills |
|---|---|
| Patients | 82 |
| Total drug cost | $7,020,463 |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- University of Texas Southwestern Medical Center at DallasDallas, TX · 3,187 clinicians
Hospital affiliation
Industry payments (Open Payments)
- 2025$5,397 · 7 payments from 3 companies
- 2024$2,238 · 6 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Eisai Inc. | $5,078 | 4 |
| Aveo Pharmaceuticals, Inc. | $169.31 | 2 |
| Janssen Biotech, Inc. | $150.00 | 1 |
What the 2025 payments were for
- Consulting Fee$4,895 · 2 payments
- Food and Beverage$502.15 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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