Mark L. Day, M.D.
NPI 1174679237ActiveIndividual· Internal Medicine· Staunton, IL
Internal Medicine (M.D.) in Staunton, Illinois, licensed in IL, with an NPI issued in January 2007. 46 Medicare patients in 2024, $3,910 paid; all of their 68 Part D prescriptions were generic.
Overview
| NPI | 1174679237 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 25, 2007 |
| Last updated in NPPES | Sep 29, 2020 |
| Certified by provider | Sep 29, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036.117437 | IL |
| Emergency Medicine | 207P00000X | 036.117437 | IL |
| General Acute Care Hospital, Critical Access | 282NC0060X | — | — |
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 | 46 |
|---|---|
| Services billed | 62 across 12 procedure codes |
| Paid by Medicare | $3,910 |
Part D prescriptions in 2024
| Prescriptions (claims) | 68 · 88 30-day fills |
|---|---|
| Patients | 22 |
| Total drug cost | $277.39 |
| Generic share | 100% of claims |
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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