Diana Pieterson
NPI 1558930073ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Randallstown, MD
Nurse Practitioner, Psych/Mental Health in Randallstown, Maryland, licensed in MD, with an NPI issued in June 2021. Their prescriptions cost Medicare Part D more than their services did: $120,620 for 1,028 claims, against $10,039 paid for services in 2024. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) reported $19.68 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1558930073 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Jun 19, 2021 |
| Last updated in NPPES | Sep 22, 2021 |
| Certified by provider | Sep 22, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | R187593 | MD |
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 - Nurse Practitioner (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 17 |
|---|---|
| Services billed | 114 across 5 procedure codes |
| Paid by Medicare | $10,039 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,028 · 1,213 30-day fills |
|---|---|
| Patients | 57 |
| Total drug cost | $120,620 |
| Generic share | 96% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Industry payments (Open Payments)
- 2025$19.68 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $19.68 | 1 |
What the 2025 payments were for
- Food and Beverage$19.68 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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