Irfan M. Hisamuddin, MD
NPI 1871798421ActiveIndividual· Specialist· Newark, DE
Specialist (MD) with Christiana Care Health Services Inc and 1 other group, practicing in Newark, Delaware. Their prescriptions cost Medicare Part D more than their services did: $556,587 for 647 claims, against $354,199 paid for services in 2024. Takeda Pharmaceuticals U.S.A., Inc. was the largest of 9 companies reporting payments in 2025, $496.73 in all, mostly food and beverage. Lists Christiana Hospital as a hospital affiliation.
Overview
| NPI | 1871798421 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 15, 2007 |
| Last updated in NPPES | Jul 22, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Specialist Primary | 174400000X | PENDING | MD |
| Internal Medicine, Gastroenterology | 207RG0100X | C1-0011248 | DE |
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 - Gastroenterology (DE); Practitioner - Gastroenterology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 634 |
|---|---|
| Services billed | 15,883 across 41 procedure codes |
| Paid by Medicare | $354,199 |
Part D prescriptions in 2024
| Prescriptions (claims) | 647 · 1,372 30-day fills |
|---|---|
| Patients | 176 |
| Total drug cost | $556,587 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1997 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical groups
- Christiana Care Health Services IncNewark, DE · 1,483 clinicians
- Delaware Center for Digestive Care LLCNewark, DE · 66 clinicians
Hospital affiliation
- Christiana HospitalNewark, DE
Industry payments (Open Payments)
- 2025$496.73 · 23 payments from 9 companies
- 2024$556.89 · 28 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Takeda Pharmaceuticals U.S.A., Inc. | $124.75 | 5 |
| Janssen Biotech, Inc. | $87.49 | 3 |
| Abbvie Inc. | $70.82 | 4 |
| Madrigal Pharmaceuticals | $56.96 | 2 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $43.66 | 2 |
What the 2025 payments were for
- Food and Beverage$496.73 · 23 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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