Eric Jonasch, M.D.
NPI 1558457028ActiveIndividual· Internal Medicine, Medical Oncology· Houston, TX
Internal Medicine, Medical Oncology (M.D.) with Physicians Referral Service, practicing in Houston, Texas. Their prescriptions cost Medicare Part D more than their services did: $4,820,065 for 533 claims, against $30,693 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 10 companies reporting payments in 2025, $108,409 in all, mostly travel and lodging.
Overview
| NPI | 1558457028 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 4, 2006 |
| Last updated in NPPES | Jul 10, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | L5394 | TX |
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 - Medical Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 166 |
|---|---|
| Services billed | 334 across 16 procedure codes |
| Paid by Medicare | $30,693 |
Part D prescriptions in 2024
| Prescriptions (claims) | 533 · 591 30-day fills |
|---|---|
| Patients | 79 |
| Total drug cost | $4,820,065 |
| Generic share | 57% of claims |
Education and affiliations
| Graduation year | 1992 |
|---|---|
| Medicare specialty | Medical Oncology |
| Telehealth | Offers telehealth |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$108,409 · 99 payments from 10 companies
- 2024$43,983 · 31 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $54,188 | 38 |
| Takeda Pharmaceuticals U.S.A., Inc. | $36,934 | 4 |
| Eisai Inc. | $5,494 | 5 |
| Telix Pharmaceuticals | $3,159 | 4 |
| Eisai Co., Ltd. | $2,910 | 1 |
What the 2025 payments were for
- Travel and Lodging$52,882 · 27 payments
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$37,398 · 5 payments
- Consulting Fee$15,215 · 10 payments
- Food and Beverage$2,897 · 56 payments
- Entertainment$16.68 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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