Hagop M. Kantarjian, MD
NPI 1316020290ActiveIndividual· Internal Medicine, Medical Oncology· Houston, TX
Internal Medicine, Medical Oncology (MD) with Physicians Referral Service, practicing in Houston, Texas. Their prescriptions cost Medicare Part D more than their services did: $500,471 for 271 claims, against $44,441 paid for services in 2024. Stemline Therapeutics Inc. was the largest of 10 companies reporting payments in 2025, $84,617 in all, mostly consulting fees.
Overview
| NPI | 1316020290 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 23, 2006 |
| Last updated in NPPES | Jul 6, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Medical Oncology Primary | 207RX0202X | G5239 | 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 - Hematology/Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 154 |
|---|---|
| Services billed | 701 across 17 procedure codes |
| Paid by Medicare | $44,441 |
Part D prescriptions in 2024
| Prescriptions (claims) | 271 · 277 30-day fills |
|---|---|
| Patients | 59 |
| Total drug cost | $500,471 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Hematology, Internal Medicine |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$84,617 · 38 payments from 10 companies
- 2024$84,310 · 26 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Stemline Therapeutics Inc. | $30,337 | 7 |
| Hikma Pharmaceuticals USA | $19,810 | 13 |
| Novartis Pharmaceuticals Corporation | $11,575 | 5 |
| Astrazeneca Pharmaceuticals LP | $5,296 | 4 |
| Sumitomo Pharma America, Inc. | $4,923 | 1 |
What the 2025 payments were for
- Consulting Fee$60,683 · 18 payments
- Travel and Lodging$9,818 · 7 payments
- Honoraria$9,500 · 1 payment
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$3,700 · 1 payment
- Food and Beverage$916.53 · 11 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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