Trisha Lynn Phemister, NP
NPI 1457017063ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Carterville, IL
Nurse Practitioner, Psych/Mental Health (NP) with Integrated Health of Southern Illinois Ltd, practicing in Carterville, Illinois. Their prescriptions cost Medicare Part D more than their services did: $332,030 for 1,044 claims, against $25,389 paid for services in 2024. Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) was the largest of 13 companies reporting payments in 2025, $3,154 in all, mostly food and beverage.
Overview
| NPI | 1457017063 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP |
| Sole proprietor | No |
| NPI issued | Nov 9, 2021 |
| Last updated in NPPES | Aug 28, 2024 |
| Certified by provider | Aug 28, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | 209024210 | IL |
| Nurse Practitioner | 363L00000X | 209024210 | 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 - Nurse Practitioner (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 46 |
|---|---|
| Services billed | 484 across 8 procedure codes |
| Paid by Medicare | $25,389 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,044 · 1,449 30-day fills |
|---|---|
| Patients | 67 |
| Total drug cost | $332,030 |
| Generic share | 76% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Integrated Health of Southern Illinois LtdHarrisburg, IL · 22 clinicians
Industry payments (Open Payments)
- 2025$3,154 · 151 payments from 13 companies
- 2024$3,625 · 156 payments from 15 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $453.41 | 19 |
| Otsuka America Pharmaceutical, Inc. | $450.10 | 27 |
| Corium, LLC | $383.87 | 30 |
| Janssen Pharmaceuticals, Inc | $379.20 | 14 |
| Axsome Therapeutics, Inc. | $313.67 | 14 |
What the 2025 payments were for
- Food and Beverage$3,154 · 151 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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