Rhian Gronewold, ARNP-BC
NPI 1912374141ActiveIndividual· Nurse Practitioner, Family· Waterloo, IA
Nurse Practitioner, Family (ARNP-BC) with Dermatology Associates PC, practicing in Waterloo, Iowa. Their prescriptions cost Medicare Part D more than their services did: $223,779 for 694 claims, against $111,528 paid for services in 2024. Ucb, Inc. was the largest of 3 companies reporting payments in 2025, $171.03 in all, mostly food and beverage.
Overview
| NPI | 1912374141 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP-BC |
| Sole proprietor | No |
| NPI issued | Aug 24, 2015 |
| Last updated in NPPES | Jan 28, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | A135130 | IA |
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 (IA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 768 |
|---|---|
| Services billed | 3,943 across 45 procedure codes |
| Paid by Medicare | $111,528 |
Part D prescriptions in 2024
| Prescriptions (claims) | 694 · 756 30-day fills |
|---|---|
| Patients | 308 |
| Total drug cost | $223,779 |
| Generic share | 92% of claims |
Education and affiliations
| Graduation year | 2015 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Dermatology Associates PCWaterloo, IA · 5 clinicians
Industry payments (Open Payments)
- 2025$171.03 · 6 payments from 3 companies
- 2024$35.83 · 2 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Ucb, Inc. | $97.76 | 4 |
| Janssen Biotech, Inc. | $66.99 | 1 |
| Organon LLC | $6.28 | 1 |
What the 2025 payments were for
- Food and Beverage$104.04 · 5 payments
- Education$66.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 67 family nurse practitioners in Waterloo · All family nurse practitioners in Iowa