Mark A. Stefaniuk, M.D.
NPI 1013932409ActiveIndividual· Family Medicine· Glenview, IL
Opted out of Medicare from January 2026 to January 2028. Family Medicine (M.D.) in Glenview, Illinois, licensed in IL and NC, with an NPI issued in July 2006. Part D covered 723 prescriptions written in 2024, 94% of them generic. Corcept Therapeutics was the largest of 25 companies reporting payments in 2025, $1,797 in all, mostly food and beverage.
Overview
| NPI | 1013932409 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jul 13, 2006 |
| Last updated in NPPES | Nov 14, 2022 |
| Certified by provider | Nov 14, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Family Medicine Primary | 207Q00000X | 036-109698 | IL |
| Emergency Medicine | 207P00000X | 89349 (ID#) | NC |
| Emergency Medicine | 207P00000X | 036-109698 | IL |
| Family Medicine | 207Q00000X | 036109698 | 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) | Not in the public enrollment file of Oct 1, 2026 |
|---|---|
| Opt-out | Opted out Jan 1, 2026 – Jan 1, 2028 |
| Can order and refer | Yes |
During an opt-out period the provider sees Medicare patients only under private contracts, and Medicare does not pay claims for their services.
Part D prescriptions in 2024
| Prescriptions (claims) | 723 · 1,253 30-day fills |
|---|---|
| Patients | 42 |
| Total drug cost | $36,154 |
| Generic share | 94% of claims |
Industry payments (Open Payments)
- 2025$1,797 · 54 payments from 25 companies
- 2024$1,226 · 32 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Corcept Therapeutics | $316.50 | 9 |
| Abbott Laboratories | $240.89 | 2 |
| Spinal Simplicity, LLC | $180.85 | 1 |
| Axsome Therapeutics, Inc. | $180.56 | 4 |
| Eisai Inc. | $126.16 | 5 |
What the 2025 payments were for
- Food and Beverage$1,797 · 54 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 45 family medicine physicians in Glenview · All family medicine physicians in Illinois