Thomas M. Tamlyn, MD
NPI 1831176338ActiveIndividual· Internal Medicine, Interventional Cardiology· Appleton, WI
Internal Medicine, Interventional Cardiology (MD) with Ascension Medical Group-Fox Valley Wisconsin, Inc and 1 other group, practicing in Appleton, Wisconsin. Their prescriptions cost Medicare Part D more than their services did: $1,081,944 for 4,613 claims, against $79,723 paid for services in 2024. Abiomed was the largest of 8 companies reporting payments in 2025, $375.13 in all, mostly food and beverage. Lists Ascension Ne Wisconsin - St Elizabeth Campus and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1831176338 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 27, 2005 |
| Last updated in NPPES | Apr 21, 2020 |
| Certified by provider | Apr 21, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Interventional Cardiology Primary | 207RI0011X | 65551 | WI |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 036102781 | 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) (WI); Practitioner - Interventional Cardiology (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 470 |
|---|---|
| Services billed | 1,250 across 109 procedure codes |
| Paid by Medicare | $79,723 |
Part D prescriptions in 2024
| Prescriptions (claims) | 4,613 · 10,708 30-day fills |
|---|---|
| Patients | 739 |
| Total drug cost | $1,081,944 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical groups
- Ascension Medical Group-Fox Valley Wisconsin, IncAppleton, WI · 259 clinicians
- Ascension Calumet Hospital IncChilton, WI · 12 clinicians
Hospital affiliations
- Ascension Ne Wisconsin - St Elizabeth CampusAppleton, WI
- Thedacare Medical Center-WaupacaWaupaca, WI
- Thedacare Regional Med Ctr - NeenahNeenah, WI
- Thedacare Regional Medical Center - Appleton IncAppleton, WI
Industry payments (Open Payments)
- 2025$375.13 · 15 payments from 8 companies
- 2024$623.90 · 24 payments from 10 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abiomed | $80.79 | 3 |
| Cleerly, Inc. | $75.40 | 1 |
| Amgen Inc. | $71.56 | 4 |
| Novartis Pharmaceuticals Corporation | $62.18 | 3 |
| Heartflow, Inc. | $24.72 | 1 |
What the 2025 payments were for
- Food and Beverage$375.13 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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