Elizabeth Marie Retzer, M.D.
NPI 1639331655ActiveIndividual· Internal Medicine, Cardiovascular Disease· La Crosse, WI
Internal Medicine, Cardiovascular Disease (M.D.) in La Crosse, Wisconsin, trained at University of Chicago, Pritzker School of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $590,413 for 5,136 claims, against $304,680 paid for services in 2024. Medtronic, Inc. was the largest of 6 companies reporting payments in 2025, $2,671 in all, mostly food and beverage.
Overview
| NPI | 1639331655 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 1, 2008 |
| Last updated in NPPES | Oct 26, 2026 |
| Certified by provider | Oct 26, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Cardiovascular Disease Primary | 207RC0000X | 88291 | WI |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 036127442 | IL |
| Internal Medicine, Interventional Cardiology | 207RI0011X | 036127442 | 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) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 4,198 |
|---|---|
| Services billed | 8,828 across 63 procedure codes |
| Paid by Medicare | $304,680 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,136 · 14,439 30-day fills |
|---|---|
| Patients | 867 |
| Total drug cost | $590,413 |
| Generic share | 91% of claims |
Education and affiliations
| Medical school | University of Chicago, Pritzker School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Cardiovascular Disease (Cardiology) |
| Secondary specialties | Interventional Cardiology |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Advocate Good Shepherd HospitalBarrington, IL
- Advocate Sherman HospitalElgin, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine McHenryMcHenry, IL
Industry payments (Open Payments)
- 2025$2,671 · 43 payments from 6 companies
- 2024$862.96 · 25 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $2,012 | 25 |
| Abbott Laboratories | $225.49 | 5 |
| Stryker Corporation | $149.31 | 8 |
| Abiomed | $147.15 | 1 |
| Edwards Lifesciences Corporation | $115.96 | 3 |
What the 2025 payments were for
- Food and Beverage$1,800 · 35 payments
- Travel and Lodging$870.22 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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