Karen S. Tjaden, M.D.
NPI 1598768251ActiveIndividual· Hospitalist· Bismarck, ND
Hospitalist (M.D.) with Monument Health Rapid City Hospital Inc and 1 other group, practicing in Bismarck, North Dakota. 224 Medicare patients in 2024, $42,407 paid; nearly all of their 286 Part D prescriptions were generic (90%). Abbvie Inc. was the largest of 4 companies reporting payments in 2025, $281.56 in all, mostly food and beverage. Lists Monument Health Rapid City Hospital and 1 other hospital as hospital affiliations.
Overview
| NPI | 1598768251 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 24, 2005 |
| Last updated in NPPES | Nov 8, 2024 |
| Certified by provider | Nov 8, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Hospitalist Primary | 208M00000X | 21598 | ND |
| Family Medicine | 207Q00000X | 4904 | 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 - Hospitalist (ND); Practitioner - Family Practice (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 224 |
|---|---|
| Services billed | 650 across 8 procedure codes |
| Paid by Medicare | $42,407 |
Part D prescriptions in 2024
| Prescriptions (claims) | 286 · 309 30-day fills |
|---|---|
| Patients | 101 |
| Total drug cost | $14,308 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Hospitalist |
Medical groups
- Monument Health Rapid City Hospital IncRapid City, SD · 564 clinicians
- Sanford BismarckBismarck, ND · 556 clinicians
Hospital affiliations
- Monument Health Rapid City HospitalRapid City, SD
- Sanford Medical Center BismarckBismarck, ND
Industry payments (Open Payments)
- 2025$281.56 · 12 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $171.84 | 6 |
| Gilead Sciences, Inc. | $50.06 | 3 |
| Pfizer Inc. | $41.45 | 2 |
| Bridgebio Pharma, Inc. | $18.21 | 1 |
What the 2025 payments were for
- Food and Beverage$281.56 · 12 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 35 hospitalists in Bismarck · All hospitalists in North Dakota