Ilan Seth Weisberg, M.D.
NPI 1417117060ActiveIndividual· Internal Medicine, Gastroenterology· New York, NY
Internal Medicine, Gastroenterology (M.D.) in New York, New York, trained at Rutgers New Jersey Medical School (class of 2003). Their prescriptions cost Medicare Part D more than their services did: $287,064 for 220 claims, against $57,872 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 10 companies reporting payments in 2025, $203,718 in all, mostly speaking and faculty fees.
Overview
| NPI | 1417117060 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 16, 2008 |
| Last updated in NPPES | Sep 18, 2023 |
| Certified by provider | Sep 18, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 237817 | NY |
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 (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 323 |
|---|---|
| Services billed | 609 across 27 procedure codes |
| Paid by Medicare | $57,872 |
Part D prescriptions in 2024
| Prescriptions (claims) | 220 · 384 30-day fills |
|---|---|
| Patients | 86 |
| Total drug cost | $287,064 |
| Generic share | 68% of claims |
Education and affiliations
| Medical school | Rutgers New Jersey Medical School |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Gastroenterology |
| Secondary specialties | Internal Medicine |
Medical group
- Kings Physician Services PCBrooklyn, NY · 648 clinicians
Hospital affiliation
- New York-Presbyterian HospitalNew York, NY
Industry payments (Open Payments)
- 2025$203,718 · 164 payments from 10 companies
- 2024$121,642 · 122 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $74,021 | 69 |
| Gilead Sciences, Inc. | $62,484 | 56 |
| Ipsen Biopharmaceuticals, Inc | $41,621 | 21 |
| Mallinckrodt Hospital Products Inc. | $25,250 | 9 |
| Abbvie Inc. | $148.15 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$166,694 · 37 payments
- Consulting Fee$18,495 · 7 payments
- Travel and Lodging$11,534 · 27 payments
- Food and Beverage$6,995 · 93 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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