Thomas C. Isaacson, MD
NPI 1104884311ActiveIndividual· Internal Medicine, Cardiovascular Disease· Las Vegas, NV
Internal Medicine, Cardiovascular Disease (MD) with Gundersen Lutheran Medical Center Inc and 2 other groups, practicing in Las Vegas, Nevada. Their prescriptions cost Medicare Part D more than their services did: $442,564 for 2,076 claims, against $69,995 paid for services in 2024. Heartflow, Inc. reported $21.14 in payments in 2025, mostly food and beverage. Lists Gundersen Lutheran Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1104884311 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 4, 2006 |
| Last updated in NPPES | Sep 7, 2021 |
| Certified by provider | Sep 7, 2021 |
Specialties and licenses
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 - Internal Medicine (IL); Practitioner - Interventional Cardiology (MI); Practitioner - Cardiovascular Disease (Cardiology) (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 414 |
|---|---|
| Services billed | 968 across 40 procedure codes |
| Paid by Medicare | $69,995 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,076 · 4,692 30-day fills |
|---|---|
| Patients | 298 |
| Total drug cost | $442,564 |
| Generic share | 80% of claims |
Education and affiliations
| Graduation year | 1987 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- Gundersen Lutheran Medical Center IncLa Crosse, WI · 895 clinicians
- Mercy Health System CorporationJanesville, WI · 753 clinicians
- Corazon Medical PCDearborn, MI · 4 clinicians
Hospital affiliations
- Gundersen Lutheran Medical CenterLa Crosse, WI
- Mercy Health System CorpJanesville, WI
- Oconomowoc Memorial HospitalOconomowoc, WI
Industry payments (Open Payments)
- 2025$21.14 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Heartflow, Inc. | $21.14 | 1 |
What the 2025 payments were for
- Food and Beverage$21.14 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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