Margaret M. Mack, PHD., MA, APRN BC
NPI 1962618686ActiveIndividual· Clinical Nurse Specialist, Psych/Mental Health, Adult· Wilmington, DE
Clinical Nurse Specialist, Psych/Mental Health, Adult (PHD., MA, APRN BC) with Delaware Psychiatry, LLC, practicing in Wilmington, Delaware. Their prescriptions cost Medicare Part D more than their services did: $52,268 for 491 claims, against $23,374 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 12 companies reporting payments in 2025, $2,534 in all, mostly food and beverage.
Overview
| NPI | 1962618686 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | PHD., MA, APRN BC |
| Sole proprietor | Yes |
| NPI issued | May 16, 2007 |
| Last updated in NPPES | Jun 29, 2021 |
| Certified by provider | Jun 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Clinical Nurse Specialist, Psych/Mental Health, Adult Primary | 364SP0809X | LE-0000123 | DE |
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 - Certified Clinical Nurse Specialist (Cns) (DE) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 25 |
|---|---|
| Services billed | 349 across 6 procedure codes |
| Paid by Medicare | $23,374 |
Part D prescriptions in 2024
| Prescriptions (claims) | 491 · 1,063 30-day fills |
|---|---|
| Patients | 40 |
| Total drug cost | $52,268 |
| Generic share | 96% of claims |
Education and affiliations
| Graduation year | 1981 |
|---|---|
| Medicare specialty | Certified Clinical Nurse Specialist (Cns) |
| Telehealth | Offers telehealth |
Medical group
- Delaware Psychiatry, LLCWilmington, DE · 3 clinicians
Industry payments (Open Payments)
- 2025$2,534 · 96 payments from 12 companies
- 2024$1,324 · 48 payments from 12 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $553.78 | 19 |
| Axsome Therapeutics, Inc. | $405.78 | 9 |
| Iti, Inc. (D/B/A Intra-Cellular Therapies, Inc.) | $399.55 | 12 |
| Bausch Health US, LLC | $251.18 | 26 |
| Vanda Pharmaceuticals Inc. | $239.07 | 9 |
What the 2025 payments were for
- Food and Beverage$2,400 · 93 payments
- Education$133.23 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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