Katherine Abigail Wittmer, APRN
NPI 1164164679ActiveIndividual· Nurse Practitioner, Acute Care· Louisville, KY
Nurse Practitioner, Acute Care (APRN) with Gastroenterology Health Partners PLLC, practicing in Louisville, Kentucky. Their prescriptions cost Medicare Part D more than their services did: $134,243 for 734 claims, against $9,982 paid for services in 2024. Abbvie Inc. was the largest of 23 companies reporting payments in 2025, $3,584 in all, mostly food and beverage. Lists Baptist Health Louisville and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1164164679 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APRN |
| Sole proprietor | No |
| NPI issued | Apr 13, 2022 |
| Last updated in NPPES | Feb 16, 2026 |
| Certified by provider | Feb 16, 2026 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Acute Care Primary | 363LA2100X | 3017460 | KY |
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 (KY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 128 |
|---|---|
| Services billed | 149 across 16 procedure codes |
| Paid by Medicare | $9,982 |
Part D prescriptions in 2024
| Prescriptions (claims) | 734 · 1,421 30-day fills |
|---|---|
| Patients | 301 |
| Total drug cost | $134,243 |
| Generic share | 78% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Gastroenterology Health Partners PLLCLouisville, KY · 29 clinicians
Hospital affiliations
- Baptist Health LouisvilleLouisville, KY
- Norton Clark HospitalJeffersonville, IN
- Norton Hospitals, IncLouisville, KY
Industry payments (Open Payments)
- 2025$3,584 · 187 payments from 23 companies
- 2024$1,271 · 58 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $818.23 | 44 |
| Janssen Biotech, Inc. | $572.29 | 23 |
| Salix Pharmaceuticals, A Division of Bausch Health US, LLC | $314.19 | 24 |
| Genzyme Corporation | $282.15 | 11 |
| Ardelyx, Inc. | $257.97 | 12 |
What the 2025 payments were for
- Food and Beverage$3,575 · 186 payments
- Education$9.24 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 164 acute care nurse practitioners in Louisville · All acute care nurse practitioners in Kentucky