Mary P. Dea, DO
NPI 1518951474ActiveIndividual· Internal Medicine· Naperville, IL
Internal Medicine (DO) in Naperville, Illinois, trained at Midwestern University, Chicago College of Osteopathic Med (class of 1993). In 2024 Medicare paid $64,154 for 232 patients, and Part D covered 296 of their prescriptions, 88% of them generic. Novo Nordisk Inc was the largest of 18 companies reporting payments in 2025, $898.74 in all, mostly food and beverage.
Overview
| NPI | 1518951474 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Sep 7, 2005 |
| Last updated in NPPES | Oct 17, 2016 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036095029 | 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) | Enrolled Practitioner - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 232 |
|---|---|
| Services billed | 1,138 across 43 procedure codes |
| Paid by Medicare | $64,154 |
Part D prescriptions in 2024
| Prescriptions (claims) | 296 · 495 30-day fills |
|---|---|
| Patients | 90 |
| Total drug cost | $13,333 |
| Generic share | 88% of claims |
Education and affiliations
| Medical school | Midwestern University, Chicago College of Osteopathic Med |
|---|---|
| Graduation year | 1993 |
| Medicare specialty | Internal Medicine |
Medical group
- Health Service Systems, IncNew Lenox, IL · 68 clinicians
Hospital affiliation
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Industry payments (Open Payments)
- 2025$898.74 · 45 payments from 18 companies
- 2024$460.15 · 22 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $133.45 | 7 |
| Lilly USA, LLC | $101.83 | 5 |
| Verity Pharmaceuticals Inc. | $95.64 | 4 |
| Bayer Healthcare Pharmaceuticals Inc. | $78.75 | 3 |
| Otsuka America Pharmaceutical, Inc. | $57.35 | 3 |
What the 2025 payments were for
- Food and Beverage$898.74 · 45 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 114 internal medicine physicians in Naperville · All internal medicine physicians in Illinois