James Benjamin Grossweiner, M.D.
NPI 1437114907ActiveIndividual· Dermatology· Naperville, IL
Dermatology (M.D.) in Naperville, Illinois, trained at R Franklin University of Med & Sci/Chicago Medical School (class of 1985). 480 Medicare patients in 2024, $142,290 paid; nearly all of their 732 Part D prescriptions were generic (95%).
Overview
| NPI | 1437114907 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 19, 2006 |
| Last updated in NPPES | Jul 18, 2022 |
| Certified by provider | Jul 18, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 036-074040 | 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 Order and Referring Only - Dermatology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 480 |
|---|---|
| Services billed | 2,675 across 58 procedure codes |
| Paid by Medicare | $142,290 |
Part D prescriptions in 2024
| Prescriptions (claims) | 732 · 850 30-day fills |
|---|---|
| Patients | 281 |
| Total drug cost | $76,566 |
| Generic share | 95% of claims |
Education and affiliations
| Medical school | R Franklin University of Med & Sci/Chicago Medical School |
|---|---|
| Graduation year | 1985 |
| Medicare specialty | Dermatology |
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 26 dermatologists in Naperville · All dermatologists in Illinois