Nizar M. Tannir, M.D.
NPI 1760588693ActiveIndividual· 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: $4,183,916 for 473 claims, against $33,534 paid for services in 2024. Eisai Inc. was the largest of 12 companies reporting payments in 2025, $9,660 in all, mostly consulting fees.
Overview
| NPI | 1760588693 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Sep 16, 2006 |
| Last updated in NPPES | Jul 8, 2007 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | G7115 | 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 | 125 |
|---|---|
| Services billed | 318 across 6 procedure codes |
| Paid by Medicare | $33,534 |
Part D prescriptions in 2024
| Prescriptions (claims) | 473 · 576 30-day fills |
|---|---|
| Patients | 70 |
| Total drug cost | $4,183,916 |
| Generic share | 58% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Medical Oncology |
| Secondary specialties | Urology |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$9,660 · 99 payments from 12 companies
- 2024$23,239 · 89 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Eisai Inc. | $2,968 | 3 |
| Eisai Co., Ltd. | $2,910 | 1 |
| Merck Sharp & Dohme LLC | $1,802 | 3 |
| Exelixis Inc. | $1,185 | 79 |
| Pfizer Inc. | $299.17 | 2 |
What the 2025 payments were for
- Consulting Fee$7,420 · 3 payments
- Food and Beverage$2,090 · 95 payments
- Travel and Lodging$150.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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