Carol B. Johnston, APN
NPI 1679810337ActiveIndividual· Nurse Practitioner, Family· Thornton, CO
Nurse Practitioner, Family (APN) with Denver Nephrologists PC, practicing in Thornton, Colorado. Their prescriptions cost Medicare Part D more than their services did: $85,838 for 454 claims, against $17,147 paid for services in 2024. Akebia Therapeutics Inc was the largest of 5 companies reporting payments in 2025, $118.72 in all, mostly food and beverage.
Overview
| NPI | 1679810337 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | APN |
| Sole proprietor | No |
| NPI issued | Jan 14, 2013 |
| Last updated in NPPES | Aug 27, 2025 |
| Certified by provider | Aug 27, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | 0990500 | 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 | 49 |
|---|---|
| Services billed | 294 across 12 procedure codes |
| Paid by Medicare | $17,147 |
Part D prescriptions in 2024
| Prescriptions (claims) | 454 · 986 30-day fills |
|---|---|
| Patients | 74 |
| Total drug cost | $85,838 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Denver Nephrologists PCDenver, CO · 47 clinicians
Industry payments (Open Payments)
- 2025$118.72 · 5 payments from 5 companies
- 2024$24.75 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Akebia Therapeutics Inc | $30.61 | 1 |
| Novo Nordisk Inc | $29.83 | 1 |
| Mallinckrodt Hospital Products Inc. | $27.36 | 1 |
| Glaxosmithkline, LLC. | $16.72 | 1 |
| Novartis Pharmaceuticals Corporation | $14.20 | 1 |
What the 2025 payments were for
- Food and Beverage$118.72 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 55 family nurse practitioners in Thornton · All family nurse practitioners in Colorado