Abigail Carrie Holzwarth, DNP, APRN, FNP-BC
NPI 1104544576ActiveIndividual· Nurse Practitioner· Billings, MT
Nurse Practitioner (DNP, APRN, FNP-BC) with Billings Clinic Specialty Supplies and Services, LLC and 1 other group, practicing in Billings, Montana. Their prescriptions cost Medicare Part D more than their services did: $86,657 for 1,147 claims, against $40,506 paid for services in 2024. Boehringer Ingelheim Pharmaceuticals, Inc. reported $18.85 in payments in 2025, mostly education. Lists Billings Clinic Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1104544576 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | DNP, APRN, FNP-BC |
| Sole proprietor | No |
| NPI issued | Aug 22, 2022 |
| Last updated in NPPES | Jan 7, 2026 |
| Certified by provider | Jan 7, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 198020 | MT |
| Nurse Practitioner, Family | 363LF0000X | 198020 | MT |
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 (MT); Practitioner - Nurse Practitioner (WY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 316 |
|---|---|
| Services billed | 936 across 10 procedure codes |
| Paid by Medicare | $40,506 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,147 · 2,169 30-day fills |
|---|---|
| Patients | 210 |
| Total drug cost | $86,657 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2022 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical groups
- Billings Clinic Specialty Supplies and Services, LLCBillings, MT · 824 clinicians
- Sheridan Memorial Hospital AssociationPlentywood, MT · 31 clinicians
Hospital affiliations
- Billings Clinic HospitalBillings, MT
- Glendive Medical CenterGlendive, MT
- North Big Horn Hospital DistrictLovell, WY
- Powell Valley HospitalPowell, WY
- Sheridan Memorial HospitalSheridan, WY
Industry payments (Open Payments)
- 2025$18.85 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $18.85 | 1 |
What the 2025 payments were for
- Education$18.85 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 82 nurse practitioners in Billings · All nurse practitioners in Montana