Kim Susan Walker, NURSE PRACTITIONER
NPI 1598549578ActiveIndividual· Nurse Practitioner, Family· Lake Arrowhead, CA
Nurse Practitioner, Family (NURSE PRACTITIONER) with Optima Health Corp, practicing in Lake Arrowhead, California. Their prescriptions cost Medicare Part D more than their services did: $54,810 for 1,020 claims, against $27,595 paid for services in 2024. Insmed, Inc. was the largest of 2 companies reporting payments in 2025, $169.30 in all, mostly food and beverage. Lists Mountains Community Hospital as a hospital affiliation.
Overview
| NPI | 1598549578 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | NURSE PRACTITIONER |
| Sole proprietor | No |
| NPI issued | Aug 22, 2023 |
| Last updated in NPPES | Aug 22, 2023 |
| Certified by provider | Aug 20, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 95026513 | CA |
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 (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 142 |
|---|---|
| Services billed | 376 across 34 procedure codes |
| Paid by Medicare | $27,595 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,020 · 1,788 30-day fills |
|---|---|
| Patients | 232 |
| Total drug cost | $54,810 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2023 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Optima Health CorpRiverside, CA · 31 clinicians
Hospital affiliation
- Mountains Community HospitalLake Arrowhead, CA
Industry payments (Open Payments)
- 2025$169.30 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Insmed, Inc. | $150.00 | 1 |
| Hollister Incorporated | $19.30 | 1 |
What the 2025 payments were for
- Food and Beverage$169.30 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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