Thomas A. Mayer, MD
NPI 1013937150ActiveIndividual· Internal Medicine, Interventional Cardiology· Bannockburn, IL
Internal Medicine, Interventional Cardiology (MD) in Bannockburn, Illinois, trained at Rush Medical College of Rush University (class of 1983). Their prescriptions cost Medicare Part D more than their services did: $1,414,339 for 7,057 claims, against $213,301 paid for services in 2024. Novo Nordisk Inc was the largest of 23 companies reporting payments in 2025, $3,292 in all, mostly food and beverage.
Overview
| NPI | 1013937150 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 20, 2006 |
| Last updated in NPPES | Oct 6, 2020 |
| Certified by provider | Oct 6, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Interventional Cardiology Primary | 207RI0011X | 36069502 | IL |
| Internal Medicine | 207R00000X | 36069502 | IL |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 36069502 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Interventional Cardiology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,166 |
|---|---|
| Services billed | 2,905 across 40 procedure codes |
| Paid by Medicare | $213,301 |
Part D prescriptions in 2024
| Prescriptions (claims) | 7,057 · 19,749 30-day fills |
|---|---|
| Patients | 860 |
| Total drug cost | $1,414,339 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Rush Medical College of Rush University |
|---|---|
| Graduation year | 1983 |
| Medicare specialty | Interventional Cardiology |
| Secondary specialties | Cardiovascular Disease (Cardiology) |
| Telehealth | Offers telehealth |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Swedish HospitalChicago, IL
Industry payments (Open Payments)
- 2025$3,292 · 121 payments from 23 companies
- 2024$4,230 · 131 payments from 21 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $427.04 | 12 |
| Novartis Pharmaceuticals Corporation | $410.20 | 17 |
| Astrazeneca Pharmaceuticals LP | $335.64 | 15 |
| Pfizer Inc. | $319.84 | 15 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $303.15 | 10 |
What the 2025 payments were for
- Food and Beverage$3,292 · 121 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records