John Lambert Flach, DO
NPI 1386223089ActiveIndividual· Psychiatry & Neurology, Neurology· Arlington Heights, IL
Psychiatry & Neurology, Neurology (DO) in Arlington Heights, Illinois, trained at Lincoln Mem Univ, Debusk Col of Osteopathic Med (class of 2021). Part D covered 183 prescriptions written in 2024, 94% of them generic. Harmony Biosciences LLC was the largest of 8 companies reporting payments in 2025, $220.76 in all, mostly food and beverage.
Overview
| NPI | 1386223089 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DO |
| Sole proprietor | No |
| NPI issued | Apr 8, 2021 |
| Last updated in NPPES | Sep 24, 2025 |
| Certified by provider | Sep 24, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 036173195 | IL |
| Internal Medicine, Critical Care Medicine | 207RC0200X | 036173195 | 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 - Neurology (IL) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 183 · 355 30-day fills |
|---|---|
| Patients | 30 |
| Total drug cost | $23,479 |
| Generic share | 94% of claims |
Education and affiliations
| Medical school | Lincoln Mem Univ, Debusk Col of Osteopathic Med |
|---|---|
| Graduation year | 2021 |
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliation
- Northwest Community Hospital 1Arlington Heights, IL
Industry payments (Open Payments)
- 2025$220.76 · 8 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Harmony Biosciences LLC | $36.78 | 1 |
| Genentech USA, Inc. | $31.64 | 1 |
| Celgene Corporation | $30.76 | 1 |
| Eisai Inc. | $28.13 | 1 |
| Teva Pharmaceuticals USA, Inc. | $24.35 | 1 |
What the 2025 payments were for
- Food and Beverage$220.76 · 8 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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