Stephen Michael Grohmann, M.D.
NPI 1033163191ActiveIndividual· Internal Medicine, Infectious Disease· Chicago, IL
Internal Medicine, Infectious Disease (M.D.) in Chicago, Illinois, trained at University of Louisville School of Medicine (class of 1986). Their prescriptions cost Medicare Part D more than their services did: $224,391 for 437 claims, against $89,162 paid for services in 2024. Merck Sharp & Dohme LLC reported $25.70 in payments in 2025, mostly education.
Overview
| NPI | 1033163191 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 20, 2006 |
| Last updated in NPPES | Apr 14, 2008 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Infectious Disease Primary | 207RI0200X | 036078269 | 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 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Infectious Disease (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 213 |
|---|---|
| Services billed | 863 across 13 procedure codes |
| Paid by Medicare | $89,162 |
Part D prescriptions in 2024
| Prescriptions (claims) | 437 · 526 30-day fills |
|---|---|
| Patients | 78 |
| Total drug cost | $224,391 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | University of Louisville School of Medicine |
|---|---|
| Graduation year | 1986 |
| Medicare specialty | Infectious Disease |
| Secondary specialties | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Infectious Disease Consultants, Ltd.Chicago, IL · 7 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Memorial HospitalChicago, IL
Other facilities
- Assure Home Healthcare, IncHome health agency · Libertyville, IL
Industry payments (Open Payments)
- 2025$25.70 · 1 payment from 1 company
- 2024$124.99 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $25.70 | 1 |
What the 2025 payments were for
- Education$25.70 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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