Mary Gordon Walter, RN/NP, PMHNP-BC
NPI 1023449642ActiveIndividual· Nurse Practitioner, Psych/Mental Health· Prince Frederick, MD
Nurse Practitioner, Psych/Mental Health (RN/NP, PMHNP-BC) with Sheppard Pratt Physicians PA and 1 other group, practicing in Prince Frederick, Maryland. Their prescriptions cost Medicare Part D more than their services did: $158,706 for 2,184 claims, against $26,081 paid for services in 2024. Indivior Inc. was the largest of 9 companies reporting payments in 2025, $442.65 in all, mostly food and beverage. Lists Calverthealth Medical Center as a hospital affiliation.
Overview
| NPI | 1023449642 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | RN/NP, PMHNP-BC |
| Sole proprietor | No |
| NPI issued | Dec 7, 2013 |
| Last updated in NPPES | Sep 29, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Psych/Mental Health Primary | 363LP0808X | R217581 | MD |
| Registered Nurse, Emergency | 163WE0003X | RN2274139 | MA |
| Nurse Practitioner, Psych/Mental Health | 363LP0808X | RN2274139 | MA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Nurse Practitioner (DC); Practitioner - Nurse Practitioner (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 134 |
|---|---|
| Services billed | 597 across 12 procedure codes |
| Paid by Medicare | $26,081 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,184 · 2,397 30-day fills |
|---|---|
| Patients | 114 |
| Total drug cost | $158,706 |
| Generic share | 96% of claims |
Education and affiliations
| Graduation year | 2013 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical groups
- Sheppard Pratt Physicians PABaltimore, MD · 67 clinicians
- Calvert County Health DepartmentPrince Frederick, MD · 19 clinicians
Hospital affiliation
- Calverthealth Medical CenterPrince Frederick, MD
Industry payments (Open Payments)
- 2025$442.65 · 30 payments from 9 companies
- 2024$491.05 · 26 payments from 13 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Indivior Inc. | $195.64 | 19 |
| Abbvie Inc. | $53.02 | 2 |
| Vanda Pharmaceuticals Inc. | $36.85 | 1 |
| Tris Pharma Inc | $35.16 | 2 |
| Alkermes, Inc. | $34.40 | 2 |
What the 2025 payments were for
- Food and Beverage$442.65 · 30 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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