Katherine Ann Gilbert, FNP
NPI 1154390847ActiveIndividual· Nurse Practitioner, Family· Portland, ME
Nurse Practitioner, Family (FNP) with Mainehealth, practicing in Portland, Maine. Their prescriptions cost Medicare Part D more than their services did: $215,156 for 1,900 claims, against $20,643 paid for services in 2024. Advanced Oxygen Therapy Inc. reported $12.04 in payments in 2025, mostly food and beverage. Lists Mainehealth Maine Medical Center as a hospital affiliation.
Overview
| NPI | 1154390847 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | FNP |
| Sole proprietor | No |
| NPI issued | Mar 15, 2006 |
| Last updated in NPPES | Jan 8, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | CNP81224 | ME |
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 (ME) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 95 |
|---|---|
| Services billed | 364 across 12 procedure codes |
| Paid by Medicare | $20,643 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,900 · 4,285 30-day fills |
|---|---|
| Patients | 162 |
| Total drug cost | $215,156 |
| Generic share | 86% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- MainehealthPortland, ME · 2,633 clinicians
Hospital affiliation
- Mainehealth Maine Medical CenterPortland, ME
Other facilities
- Mainehealth Home Health and HospiceHome health agency · Saco, ME
Industry payments (Open Payments)
- 2025$12.04 · 1 payment from 1 company
- 2024$35.07 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Advanced Oxygen Therapy Inc. | $12.04 | 1 |
What the 2025 payments were for
- Food and Beverage$12.04 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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