Chi-Ying Diana Sage, ARNP
NPI 1831722370ActiveIndividual· Nurse Practitioner, Family· Waterloo, IA
Nurse Practitioner, Family (ARNP) with Matthew Smith MD PC, practicing in Waterloo, Iowa. Their prescriptions cost Medicare Part D more than their services did: $108,292 for 2,197 claims, against $42,642 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 23 companies reporting payments in 2025, $2,901 in all, mostly food and beverage. Lists Allen Hospital as a hospital affiliation.
Overview
| NPI | 1831722370 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | ARNP |
| Sole proprietor | Yes |
| NPI issued | Feb 12, 2020 |
| Last updated in NPPES | May 14, 2020 |
| Certified by provider | May 14, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | A157738 | IA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 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 | 174 |
|---|---|
| Services billed | 656 across 27 procedure codes |
| Paid by Medicare | $42,642 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,197 · 5,275 30-day fills |
|---|---|
| Patients | 410 |
| Total drug cost | $108,292 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 2019 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Matthew Smith MD PCWaterloo, IA · 2 clinicians
Hospital affiliation
- Allen HospitalWaterloo, IA
Industry payments (Open Payments)
- 2025$2,901 · 165 payments from 23 companies
- 2024$2,746 · 154 payments from 23 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $475.49 | 33 |
| Pfizer Inc. | $415.54 | 23 |
| Abbvie Inc. | $411.53 | 21 |
| Lilly USA, LLC | $227.23 | 16 |
| Amgen Inc. | $205.70 | 15 |
What the 2025 payments were for
- Food and Beverage$2,901 · 165 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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