Dariusz A. Lazarczyk, MD
NPI 1083603500ActiveIndividual· Internal Medicine, Gastroenterology· Troy, MI
Internal Medicine, Gastroenterology (MD) with Gastrointestinal Specialists PC, practicing in Troy, Michigan. In 2024 Medicare paid $87,900 for 398 patients, and Part D covered 610 of their prescriptions, 88% of them generic. Janssen Biotech, Inc. was the largest of 2 companies reporting payments in 2025, $413.91 in all, mostly food and beverage. Lists Beaumont Hospital Royal Oak and 1 other hospital as hospital affiliations.
Overview
| NPI | 1083603500 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 18, 2005 |
| Last updated in NPPES | Oct 23, 2020 |
| Certified by provider | Oct 23, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 063367 | MI |
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 - Gastroenterology (MI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 398 |
|---|---|
| Services billed | 951 across 38 procedure codes |
| Paid by Medicare | $87,900 |
Part D prescriptions in 2024
| Prescriptions (claims) | 610 · 1,180 30-day fills |
|---|---|
| Patients | 228 |
| Total drug cost | $66,977 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 1988 |
|---|---|
| Medicare specialty | Gastroenterology |
Medical group
- Gastrointestinal Specialists PCTroy, MI · 16 clinicians
Hospital affiliations
- Beaumont Hospital Royal OakRoyal Oak, MI
- Beaumont Hospital, TroyTroy, MI
Industry payments (Open Payments)
- 2025$413.91 · 6 payments from 2 companies
- 2024$407.68 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Janssen Biotech, Inc. | $366.03 | 5 |
| Janssen Scientific Affairs, LLC | $47.88 | 1 |
What the 2025 payments were for
- Food and Beverage$328.92 · 5 payments
- Education$84.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other gastroenterologists in Troy
- 1003898347
- 1093797326
- 1134119191
- 1184605206
- 1366821639
- 1548558588
- 1568444545
- 1689656662
- 1770568289
- 1972585925
- 1982693677
- 1184613879
All 21 gastroenterologists in Troy · All gastroenterologists in Michigan