James Mastrianni
NPI 1821149808ActiveIndividual· Psychiatry & Neurology, Neurology· Chicago, IL
Psychiatry & Neurology, Neurology with University of Chicago and 1 other group, practicing in Chicago, Illinois. 250 Medicare patients in 2024, $46,355 paid; nearly all of their 1,018 Part D prescriptions were generic (95%). Ionis Pharmaceuticals, Inc. reported $4,500 in payments in 2025, mostly consulting fees. Lists Northshore University Healthsystem - Evanston Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1821149808 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jan 16, 2007 |
| Last updated in NPPES | Oct 24, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Psychiatry & Neurology, Neurology Primary | 2084N0400X | 036099006 | 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 - Neurology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 250 |
|---|---|
| Services billed | 397 across 14 procedure codes |
| Paid by Medicare | $46,355 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,018 · 2,270 30-day fills |
|---|---|
| Patients | 253 |
| Total drug cost | $41,912 |
| Generic share | 95% of claims |
Education and affiliations
| Graduation year | 1989 |
|---|---|
| Medicare specialty | Neurology |
| Telehealth | Offers telehealth |
Medical groups
- University of ChicagoChicago, IL · 1,712 clinicians
- The University of Chicago Medical CenterChicago, IL · 915 clinicians
Hospital affiliations
- Northshore University Healthsystem - Evanston HospitalEvanston, IL
- The University of Chicago Medical CenterChicago, IL
- Uchicago Medicine Northwest IndianaCrown Point, IN
Industry payments (Open Payments)
- 2025$4,500 · 2 payments from 1 company
- 2024$17.13 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ionis Pharmaceuticals, Inc. | $4,500 | 2 |
What the 2025 payments were for
- Consulting Fee$4,500 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other neurologists in Chicago
- 1003062589
- 1003082934
- 1003302159
- 1003349028
- 1003899428
- 1013032499
- 1013772029
- 1023028750
- 1033431846
- 1043668239
- 1053562355
- 1053816843
All 440 neurologists in Chicago · All neurologists in Illinois