Michael Jon Sommerfeld, MD
NPI 1578547063ActiveIndividual· Internal Medicine· Lake Forest, IL
Internal Medicine (MD) in Lake Forest, Illinois, trained at R Franklin University of Med & Sci/Chicago Medical School (class of 1999). Their prescriptions cost Medicare Part D more than their services did: $417,684 for 3,715 claims, against $42,196 paid for services in 2024. Novo Nordisk Inc reported $50.28 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1578547063 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Nov 30, 2005 |
| Last updated in NPPES | Jun 17, 2026 |
| Certified by provider | Jun 17, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036105987 | 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 | 222 |
|---|---|
| Services billed | 555 across 14 procedure codes |
| Paid by Medicare | $42,196 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,715 · 8,084 30-day fills |
|---|---|
| Patients | 255 |
| Total drug cost | $417,684 |
| Generic share | 86% of claims |
Education and affiliations
| Medical school | R Franklin University of Med & Sci/Chicago Medical School |
|---|---|
| Graduation year | 1999 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Advocate Condell Medical CenterLibertyville, IL
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Swedish HospitalChicago, IL
Industry payments (Open Payments)
- 2025$50.28 · 2 payments from 1 company
- 2024$25.12 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novo Nordisk Inc | $50.28 | 2 |
What the 2025 payments were for
- Food and Beverage$50.28 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 34 internal medicine physicians in Lake Forest · All internal medicine physicians in Illinois