Robert Jen, M.D.
NPI 1104169994ActiveIndividual· Internal Medicine· Oak Lawn, IL
Internal Medicine (M.D.) in Oak Lawn, Illinois, trained at University of Cincinnati College of Medicine (class of 2013). 154 Medicare patients in 2024, $61,515 paid; nearly all of their 133 Part D prescriptions were generic (93%).
Overview
| NPI | 1104169994 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Apr 1, 2013 |
| Last updated in NPPES | Oct 6, 2025 |
| Certified by provider | Oct 6, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 125.063485 | 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 | 154 |
|---|---|
| Services billed | 629 across 7 procedure codes |
| Paid by Medicare | $61,515 |
Part D prescriptions in 2024
| Prescriptions (claims) | 133 · 135 30-day fills |
|---|---|
| Patients | 68 |
| Total drug cost | $3,808 |
| Generic share | 93% of claims |
Education and affiliations
| Medical school | University of Cincinnati College of Medicine |
|---|---|
| Graduation year | 2013 |
| Medicare specialty | Internal Medicine |
Medical group
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
Hospital affiliation
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
Other facilities
- Advocate HospiceHospice · Oak Brook, IL
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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All 194 internal medicine physicians in Oak Lawn · All internal medicine physicians in Illinois