Karla Sue Wallen, NP-C
NPI 1598420739ActiveIndividual· Nurse Practitioner, Family· Longmont, CO
Nurse Practitioner, Family (NP-C) with Catholic Health Initiatives Colorado, practicing in Longmont, Colorado. Their prescriptions cost Medicare Part D more than their services did: $99,196 for 1,573 claims, against $11,313 paid for services in 2024. Exact Sciences Corporation was the largest of 2 companies reporting payments in 2025, $42.41 in all, mostly food and beverage. Lists Longmont United Hospital as a hospital affiliation.
Overview
| NPI | 1598420739 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NP-C |
| Sole proprietor | No |
| NPI issued | Nov 2, 2021 |
| Last updated in NPPES | Dec 15, 2021 |
| Certified by provider | Dec 15, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | APN.0997083-NP | CO |
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 (CO) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 68 |
|---|---|
| Services billed | 252 across 29 procedure codes |
| Paid by Medicare | $11,313 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,573 · 3,311 30-day fills |
|---|---|
| Patients | 169 |
| Total drug cost | $99,196 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2021 |
|---|---|
| Medicare specialty | Nurse Practitioner |
| Telehealth | Offers telehealth |
Medical group
- Catholic Health Initiatives ColoradoLakewood, CO · 1,225 clinicians
Hospital affiliation
- Longmont United HospitalLongmont, CO
Industry payments (Open Payments)
- 2025$42.41 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Exact Sciences Corporation | $24.90 | 1 |
| Glaxosmithkline, LLC. | $17.51 | 1 |
What the 2025 payments were for
- Food and Beverage$42.41 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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