Kristina M. Rieffenberger, CNP
NPI 1891950986ActiveIndividual· Nurse Practitioner, Family· Watertown, SD
Nurse Practitioner, Family (CNP) with Prairie Lakes Health Care System Inc, practicing in Watertown, South Dakota. Their prescriptions cost Medicare Part D more than their services did: $851,146 for 539 claims, against $23,936 paid for services in 2024. E.R. Squibb & Sons, L.L.C. was the largest of 22 companies reporting payments in 2025, $608.36 in all, mostly food and beverage. Lists Johnson Memorial Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1891950986 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | CNP |
| Sole proprietor | No |
| NPI issued | Jul 28, 2008 |
| Last updated in NPPES | Mar 29, 2012 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Nurse Practitioner, Family Primary | 363LF0000X | CP00534 | SD |
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 (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 164 |
|---|---|
| Services billed | 450 across 5 procedure codes |
| Paid by Medicare | $23,936 |
Part D prescriptions in 2024
| Prescriptions (claims) | 539 · 924 30-day fills |
|---|---|
| Patients | 109 |
| Total drug cost | $851,146 |
| Generic share | 88% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | Nurse Practitioner |
Medical group
- Prairie Lakes Health Care System IncWatertown, SD · 109 clinicians
Hospital affiliations
- Johnson Memorial HospitalDawson, MN
- Madison HospitalMadison, MN
- Milbank Area Hospital/Avera HealthMilbank, SD
- Prairie Lakes Healthcare System, IncWatertown, SD
- Sanford Hospital Webster - CahWebster, SD
Industry payments (Open Payments)
- 2025$608.36 · 34 payments from 22 companies
- 2024$1,204 · 61 payments from 30 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| E.R. Squibb & Sons, L.L.C. | $73.62 | 4 |
| Janssen Biotech, Inc. | $54.83 | 3 |
| Novartis Pharmaceuticals Corporation | $41.33 | 2 |
| Genzyme Corporation | $39.22 | 2 |
| Lilly USA, LLC | $36.57 | 2 |
What the 2025 payments were for
- Food and Beverage$582.36 · 33 payments
- Education$26.00 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 24 family nurse practitioners in Watertown · All family nurse practitioners in South Dakota