Marc Posner, M.D.
NPI 1871569574ActiveIndividual· Radiology, Radiation Oncology· Lake Forest, IL
Radiology, Radiation Oncology (M.D.) in Lake Forest, Illinois, trained at Harvard Medical School (class of 1995). Mostly services rather than prescriptions: Medicare paid $270,482 for 269 patients in 2024, with only 48 Part D claims. Elekta, Inc. reported $396.56 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1871569574 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Feb 23, 2006 |
| Last updated in NPPES | Sep 2, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | 036102182 | IL |
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 - Radiation Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 269 |
|---|---|
| Services billed | 3,718 across 33 procedure codes |
| Paid by Medicare | $270,482 |
Part D prescriptions in 2024
| Prescriptions (claims) | 48 · 124 30-day fills |
|---|---|
| Patients | 21 |
| Total drug cost | $828.72 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Harvard Medical School |
|---|---|
| Graduation year | 1995 |
| Medicare specialty | Radiation Oncology |
Medical group
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Memorial HospitalChicago, IL
Industry payments (Open Payments)
- 2025$396.56 · 4 payments from 1 company
- 2024$2,519 · 5 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Elekta, Inc. | $396.56 | 4 |
What the 2025 payments were for
- Food and Beverage$396.56 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Radiology, Radiation Oncology providers in Lake Forest
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