Catherine Diaz, APNP
NPI 1225439227ActiveIndividual· Nurse Practitioner· Madison, WI
Nurse Practitioner (APNP) in Madison, Wisconsin, trained at University of Wisconsin School of Medicine (class of 2014). Their prescriptions cost Medicare Part D more than their services did: $25,539 for 129 claims, against $3,263 paid for services in 2024.
Overview
| NPI | 1225439227 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APNP |
| Sole proprietor | No |
| NPI issued | Sep 9, 2014 |
| Last updated in NPPES | Sep 10, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner Primary | 363L00000X | 5902 | WI |
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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 36 |
|---|---|
| Services billed | 47 across 9 procedure codes |
| Paid by Medicare | $3,263 |
Part D prescriptions in 2024
| Prescriptions (claims) | 129 · 309 30-day fills |
|---|---|
| Patients | 48 |
| Total drug cost | $25,539 |
| Generic share | 76% of claims |
Education and affiliations
| Medical school | University of Wisconsin School of Medicine |
|---|---|
| Graduation year | 2014 |
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- University of Wisconsin Medical Foundation IncMadison, WI · 2,553 clinicians
Hospital affiliations
- Stoughton HospitalStoughton, WI
- Unitypoint Health - MeriterMadison, WI
- University of Wi Hospitals & Clinics AuthorityMadison, WI
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 530 nurse practitioners in Madison · All nurse practitioners in Wisconsin