Siri Shirene Knutsen Larson, M.D.
NPI 1659696672ActiveIndividual· Dermatology· Rapid City, SD
Dermatology (M.D.) in Rapid City, South Dakota, trained at University of South Carolina School of Medicine (class of 2010). 1,077 Medicare patients in 2024, $326,323 paid; nearly all of their 537 Part D prescriptions were generic (92%). Abbvie Inc. was the largest of 7 companies reporting payments in 2025, $542.70 in all, mostly food and beverage.
Overview
| NPI | 1659696672 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Apr 1, 2010 |
| Last updated in NPPES | Jan 14, 2015 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Dermatology Primary | 207N00000X | 9107 | SD |
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 - Dermatology (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,077 |
|---|---|
| Services billed | 6,223 across 74 procedure codes |
| Paid by Medicare | $326,323 |
Part D prescriptions in 2024
| Prescriptions (claims) | 537 · 684 30-day fills |
|---|---|
| Patients | 233 |
| Total drug cost | $259,839 |
| Generic share | 92% of claims |
Education and affiliations
| Medical school | University of South Carolina School of Medicine |
|---|---|
| Graduation year | 2010 |
| Medicare specialty | Dermatology |
Medical group
- Monument Health Rapid City Hospital IncRapid City, SD · 564 clinicians
Hospital affiliation
- Monument Health Rapid City HospitalRapid City, SD
Industry payments (Open Payments)
- 2025$542.70 · 30 payments from 7 companies
- 2024$867.37 · 34 payments from 8 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $293.16 | 18 |
| Regeneron Healthcare Solutions, Inc. | $89.71 | 4 |
| Lilly USA, LLC | $44.48 | 2 |
| Kyowa Kirin, Inc. | $42.33 | 2 |
| Amgen Inc. | $40.59 | 2 |
What the 2025 payments were for
- Food and Beverage$533.05 · 29 payments
- Education$9.65 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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