John Ernzen, MD
NPI 1346615663ActiveIndividual· Psychiatry & Neurology, Psychiatry· Chicago, IL
Psychiatry & Neurology, Psychiatry (MD) in Chicago, Illinois, trained at Northwestern University Feinberg Medical School (class of 2019). Mostly services rather than prescriptions: Medicare paid $7,085 for 60 patients in 2024, with only 33 Part D claims.
Overview
| NPI | 1346615663 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 11, 2015 |
| Last updated in NPPES | May 27, 2022 |
| Certified by provider | May 12, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Psychiatry Primary | 2084P0800X | 036157705 | IL |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - Psychiatry (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 60 |
|---|---|
| Services billed | 100 across 3 procedure codes |
| Paid by Medicare | $7,085 |
Part D prescriptions in 2024
| Prescriptions (claims) | 33 · 33 30-day fills |
|---|---|
| Total drug cost | $2,885 |
| Generic share | 97% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Psychiatry |
Medical group
- 2014 Health LLCDes Plaines, IL · 24 clinicians
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 1,083 psychiatrists in Chicago · All psychiatrists in Illinois