Isaac Thomas, MD
NPI 1083662894ActiveIndividual· Internal Medicine, Cardiovascular Disease· Gurnee, IL
Internal Medicine, Cardiovascular Disease (MD) with Froedtert South Inc and 2 other groups, practicing in Gurnee, Illinois. Their prescriptions cost Medicare Part D more than their services did: $677,264 for 2,525 claims, against $165,977 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 20 companies reporting payments in 2025, $1,343 in all, mostly food and beverage. Lists Advocate Condell Medical Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1083662894 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 4, 2006 |
| Last updated in NPPES | May 8, 2026 |
| Certified by provider | May 8, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 13522 | WI |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 036.063274 | IL |
| Specialist | 174400000X | 036063274 | IL |
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 - Cardiovascular Disease (Cardiology) (IL); Practitioner - Cardiovascular Disease (Cardiology) (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 871 |
|---|---|
| Services billed | 3,016 across 64 procedure codes |
| Paid by Medicare | $165,977 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,525 · 6,659 30-day fills |
|---|---|
| Patients | 317 |
| Total drug cost | $677,264 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- Froedtert South IncKenosha, WI · 161 clinicians
- City of Hope Medical Group of Illinois PLLCZion, IL · 129 clinicians
- Thomas and Thomas Medical LtdGurnee, IL · 2 clinicians
Hospital affiliations
- Advocate Condell Medical CenterLibertyville, IL
- Froedtert South Inc.Kenosha, WI
- Midwestern Region Med Center, IncZion, IL
Industry payments (Open Payments)
- 2025$1,343 · 55 payments from 20 companies
- 2024$1,748 · 59 payments from 17 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $189.43 | 9 |
| E.R. Squibb & Sons, L.L.C. | $178.72 | 5 |
| Novartis Pharmaceuticals Corporation | $160.96 | 11 |
| Astrazeneca Pharmaceuticals LP | $101.47 | 4 |
| Lantheus Medical Imaging, Inc. | $99.58 | 1 |
What the 2025 payments were for
- Food and Beverage$1,343 · 55 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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