Michael James Brennan, DO, MPH
NPI 1811550981ActiveIndividual· Internal Medicine, Critical Care Medicine· Chicago, IL
Internal Medicine, Critical Care Medicine (DO, MPH) in Chicago, Illinois, trained at Lake Erie Col of Osteopathic Medicine, Bradenton (class of 2019). 66 Medicare patients in 2024, $8,097 paid; nearly all of their 51 Part D prescriptions were generic (96%). Tersera Therapeutics LLC reported $24.44 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1811550981 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO, MPH |
| Sole proprietor | No |
| NPI issued | Apr 15, 2019 |
| Last updated in NPPES | Sep 24, 2025 |
| Certified by provider | Sep 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Critical Care Medicine Primary | 207RC0200X | 036.164300 | IL |
| Emergency Medicine | 207P00000X | 5101025918 | MI |
| Emergency Medicine | 207P00000X | 036.164300 | IL |
| Emergency Medicine | 207P00000X | 5151013942 | MI |
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 - Emergency Medicine (IA); Practitioner - Critical Care (Intensivists) (IL); Practitioner - Emergency Medicine (MN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 66 |
|---|---|
| Services billed | 78 across 10 procedure codes |
| Paid by Medicare | $8,097 |
Part D prescriptions in 2024
| Prescriptions (claims) | 51 · 54 30-day fills |
|---|---|
| Patients | 38 |
| Total drug cost | $1,127 |
| Generic share | 96% of claims |
Education and affiliations
| Medical school | Lake Erie Col of Osteopathic Medicine, Bradenton |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Critical Care (Intensivists) |
Medical groups
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
- Rush University Medical GroupChicago, IL · 1,551 clinicians
- Riverside Emergency Physicians LLCKankakee, IL · 39 clinicians
- Rush Oak Park ER Physicians GroupOak Park, IL · 28 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Advocate Trinity HospitalChicago, IL
- Rush Oak Park HospitalOak Park, IL
Other facilities
- Advocate HospiceHospice · Oak Brook, IL
Industry payments (Open Payments)
- 2025$24.44 · 1 payment from 1 company
- 2024$51.66 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Tersera Therapeutics LLC | $24.44 | 1 |
What the 2025 payments were for
- Food and Beverage$24.44 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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