Mariam El-Ashmawy, MD, PHD
NPI 1750816641ActiveIndividual· Internal Medicine, Hematology & Oncology· Dallas, TX
Internal Medicine, Hematology & Oncology (MD, PHD) with University of Texas Southwestern Medical Center at Dallas and 1 other group, practicing in Dallas, Texas. Mostly services rather than prescriptions: Medicare paid $37,019 for 74 patients in 2024, with only 24 Part D claims. Delcath Systems was the largest of 3 companies reporting payments in 2025, $453.70 in all, mostly food and beverage. Lists New York-Presbyterian Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1750816641 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PHD |
| Sole proprietor | No |
| NPI issued | Apr 27, 2017 |
| Last updated in NPPES | Mar 9, 2026 |
| Certified by provider | Mar 9, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | W3253 | 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 (NY); Practitioner - Hematology/Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 74 |
|---|---|
| Services billed | 322 across 10 procedure codes |
| Paid by Medicare | $37,019 |
Part D prescriptions in 2024
| Prescriptions (claims) | 24 · 28 30-day fills |
|---|---|
| Patients | 15 |
| Total drug cost | $18,546 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2017 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical groups
- University of Texas Southwestern Medical Center at DallasDallas, TX · 3,187 clinicians
- Trustees of Columbia University in the City of New YorkNew York, NY · 2,296 clinicians
Hospital affiliations
Industry payments (Open Payments)
- 2025$453.70 · 4 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Delcath Systems | $373.26 | 2 |
| Immunocore Limited | $45.85 | 1 |
| Novartis Pharmaceuticals Corporation | $34.59 | 1 |
What the 2025 payments were for
- Food and Beverage$453.70 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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