Gerald Jay Osher, M.D.
NPI 1326056136ActiveIndividual· Internal Medicine· Bannockburn, IL
Internal Medicine (M.D.) in Bannockburn, Illinois, trained at University of Michigan Medical School (class of 1980). Their prescriptions cost Medicare Part D more than their services did: $754,948 for 5,375 claims, against $61,353 paid for services in 2024. Itamar Medical Inc reported $57.38 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1326056136 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Aug 4, 2006 |
| Last updated in NPPES | Dec 19, 2025 |
| Certified by provider | Dec 19, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036066116 | 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 | 284 |
|---|---|
| Services billed | 913 across 29 procedure codes |
| Paid by Medicare | $61,353 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,375 · 12,383 30-day fills |
|---|---|
| Patients | 344 |
| Total drug cost | $754,948 |
| Generic share | 84% of claims |
Education and affiliations
| Medical school | University of Michigan Medical School |
|---|---|
| Graduation year | 1980 |
| Medicare specialty | Internal Medicine |
Medical group
- Brent M Nathan MD PLLCBannockburn, IL · 5 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- Northwestern Lake Forest HospitalLake Forest, IL
- Northwestern Memorial HospitalChicago, IL
Other facilities
- Guardian Home Health Care, LLCHome health agency · Northfield, IL
- Vitas Healthcare Corporation of IllinoisHospice · Lombard, IL
- Shirley Ryan AbilitylabInpatient rehabilitation facility · Chicago, IL
- Lake Forest PlaceNursing home · Lake Forest, IL
Industry payments (Open Payments)
- 2025$57.38 · 1 payment from 1 company
- 2024$85.70 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Itamar Medical Inc | $57.38 | 1 |
What the 2025 payments were for
- Food and Beverage$57.38 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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