Mark P. Demus, MD
NPI 1477571479ActiveIndividual· Emergency Medicine· Hoffman Estates, IL
Emergency Medicine (MD) in Hoffman Estates, Illinois, trained at Northwestern University Feinberg Medical School (class of 1981). 639 Medicare patients in 2024, $87,295 paid; nearly all of their 379 Part D prescriptions were generic (97%). Inari Medical, Inc. reported $18.39 in payments in 2024, mostly food and beverage.
Overview
| NPI | 1477571479 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jul 17, 2006 |
| Last updated in NPPES | Apr 28, 2021 |
| Certified by provider | Apr 28, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Emergency Medicine Primary | 207P00000X | 036-065552 | IL |
| General Acute Care Hospital | 282N00000X | 036065552 | IL |
| General Acute Care Hospital | 282N00000X | — | — |
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 (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 639 |
|---|---|
| Services billed | 734 across 29 procedure codes |
| Paid by Medicare | $87,295 |
Part D prescriptions in 2024
| Prescriptions (claims) | 379 · 380 30-day fills |
|---|---|
| Patients | 300 |
| Total drug cost | $4,783 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 1981 |
| Medicare specialty | Internal Medicine |
| Secondary specialties | Emergency Medicine |
Medical groups
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
- Cepamerica Illinois LLPArlington Heights, IL · 499 clinicians
Hospital affiliations
- Northwest Community Hospital 1Arlington Heights, IL
- St Alexius Medical CenterHoffman Estates, IL
Industry payments (Open Payments)
- 2024$18.39 · 1 payment from 1 company
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Inari Medical, Inc. | $18.39 | 1 |
What the 2024 payments were for
- Food and Beverage$18.39 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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