Marissa F. Kleffman Underwood, ARNP
NPI 1144691528ActiveIndividual· Nurse Practitioner, Family· Greenville, NC
Nurse Practitioner, Family (ARNP) with East Carolina University, practicing in Greenville, North Carolina. Their prescriptions cost Medicare Part D more than their services did: $266,006 for 2,181 claims, against $19,779 paid for services in 2024. Exact Sciences Corporation was the largest of 5 companies reporting payments in 2025, $120.64 in all, mostly food and beverage. Lists Ecu Health Medical Center as a hospital affiliation.
Overview
| NPI | 1144691528 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | No |
| NPI issued | Oct 12, 2015 |
| Last updated in NPPES | Feb 16, 2024 |
| Certified by provider | Feb 16, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 264412 | NC |
| Nurse Practitioner, Family | 363LF0000X | 5008128 | NC |
| Nurse Practitioner | 363L00000X | ARNP9467370 | FL |
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 (NC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 116 |
|---|---|
| Services billed | 480 across 41 procedure codes |
| Paid by Medicare | $19,779 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,181 · 4,583 30-day fills |
|---|---|
| Patients | 191 |
| Total drug cost | $266,006 |
| Generic share | 81% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- East Carolina UniversityGreenville, NC · 499 clinicians
Hospital affiliation
- Ecu Health Medical CenterGreenville, NC
Other facilities
- Centerwell Home HealthHome health agency · Greenville, NC
Industry payments (Open Payments)
- 2025$120.64 · 6 payments from 5 companies
- 2024$115.77 · 6 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $31.64 | 2 |
| Boston Scientific Corporation | $29.29 | 1 |
| Abbott Laboratories | $25.30 | 1 |
| Tactile Systems Technology Inc | $19.10 | 1 |
| Medtronic, Inc. | $15.31 | 1 |
What the 2025 payments were for
- Food and Beverage$120.64 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 165 family nurse practitioners in Greenville · All family nurse practitioners in North Carolina