Riley Aaron Lamb, M.D.
NPI 1588815641ActiveIndividual· Surgery· Pierre, SD
Surgery (M.D.) with Avera St Marys and 1 other group, practicing in Pierre, South Dakota. 235 Medicare patients in 2024, $47,206 paid; nearly all of their 128 Part D prescriptions were generic (90%). Merck Sharp & Dohme LLC reported $14.90 in payments in 2025, mostly food and beverage. Lists Avera McKennan Hospital & University Health Center and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1588815641 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Oct 8, 2008 |
| Last updated in NPPES | Apr 1, 2014 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Surgery Primary | 208600000X | 8931 | SD |
| Student in an Organized Health Care Education/Training Program | 390200000X | — | — |
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 - General Surgery (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 235 |
|---|---|
| Services billed | 446 across 51 procedure codes |
| Paid by Medicare | $47,206 |
Part D prescriptions in 2024
| Prescriptions (claims) | 128 · 225 30-day fills |
|---|---|
| Patients | 59 |
| Total drug cost | $2,112 |
| Generic share | 90% of claims |
Education and affiliations
| Graduation year | 2008 |
|---|---|
| Medicare specialty | General Surgery |
Medical groups
- Avera St MarysPierre, SD · 97 clinicians
- Avera GettysburgGettysburg, SD · 13 clinicians
Hospital affiliations
- Avera McKennan Hospital & University Health CenterSioux Falls, SD
- Avera Missouri River Health CenterGettysburg, SD
- Avera St Mary's HospitalPierre, SD
Industry payments (Open Payments)
- 2025$14.90 · 1 payment from 1 company
- 2024$18.00 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $14.90 | 1 |
What the 2025 payments were for
- Food and Beverage$14.90 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Surgery providers in Pierre
- 1538321708
- 1023083797
- 1538122015