Eammon Grosek
NPI 1154855732ActiveIndividual· Internal Medicine· Marshfield, WI
Internal Medicine in Marshfield, Wisconsin, trained at Sanford School of Medicine of University of South Dakota (class of 2016). Their prescriptions cost Medicare Part D more than their services did: $1,084,533 for 10,965 claims, against $86,447 paid for services in 2024.
Overview
| NPI | 1154855732 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Apr 20, 2017 |
| Last updated in NPPES | Apr 20, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 6523 | WI |
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 (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 445 |
|---|---|
| Services billed | 1,173 across 25 procedure codes |
| Paid by Medicare | $86,447 |
Part D prescriptions in 2024
| Prescriptions (claims) | 10,965 · 23,490 30-day fills |
|---|---|
| Patients | 673 |
| Total drug cost | $1,084,533 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | Sanford School of Medicine of University of South Dakota |
|---|---|
| Graduation year | 2016 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Monument Health Rapid City Hospital IncRapid City, SD · 564 clinicians
Hospital affiliations
- Monument Health Rapid City HospitalRapid City, SD
- Monument Health Spearfish HospitalSpearfish, SD
- Monument Health Sturgis HospitalSturgis, SD
Other facilities
- Good Samaritan Soc-Home Health of the Black HillsHome health agency · Rapid City, SD
- Monument Health Home Plus Home HealthHome health agency · Rapid City, SD
- Westhills Village Home HealthHome health agency · Rapid City, SD
- Monument Health Home Plus HospiceHospice · Rapid City, SD
- Westhills Village Health Care FacilityNursing home · Rapid City, SD
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 66 internal medicine physicians in Marshfield · All internal medicine physicians in Wisconsin