Arumugam Sivakumar, MD
NPI 1578563102ActiveIndividual· Internal Medicine, Gastroenterology· Henderson, NV
Internal Medicine, Gastroenterology (MD) in Henderson, Nevada, licensed in NV, with an NPI issued in July 2005. Their prescriptions cost Medicare Part D more than their services did: $282,408 for 803 claims, against $86,825 paid for services in 2024. Janssen Biotech, Inc. was the largest of 7 companies reporting payments in 2025, $1,076 in all, mostly food and beverage. Lists Saint Rose Dominican Hospitals - Siena Campus as a hospital affiliation.
Overview
| NPI | 1578563102 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 26, 2005 |
| Last updated in NPPES | Dec 12, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 6544 | NV |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Gastroenterology (NV) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 427 |
|---|---|
| Services billed | 946 across 19 procedure codes |
| Paid by Medicare | $86,825 |
Part D prescriptions in 2024
| Prescriptions (claims) | 803 · 1,751 30-day fills |
|---|---|
| Patients | 230 |
| Total drug cost | $282,408 |
| Generic share | 83% of claims |
Education and affiliations
| Graduation year | 1975 |
|---|---|
| Medicare specialty | Gastroenterology |
Hospital affiliation
- Saint Rose Dominican Hospitals - Siena CampusHenderson, NV
Industry payments (Open Payments)
- 2025$1,076 · 57 payments from 7 companies
- 2024$1,706 · 74 payments from 11 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $560.94 | 24 |
| Abbvie Inc. | $238.99 | 16 |
| Phathom Pharmaceuticals, Inc. | $147.22 | 12 |
| Regeneron Healthcare Solutions, Inc. | $43.23 | 2 |
| Madrigal Pharmaceuticals | $38.69 | 1 |
What the 2025 payments were for
- Food and Beverage$991.88 · 56 payments
- Education$84.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 gastroenterologists in Henderson · All gastroenterologists in Nevada