Liam M. Duffy, MD
NPI 1902369820ActiveIndividual· Otolaryngology· Rapid City, SD
Otolaryngology (MD) in Rapid City, South Dakota, trained at Sanford School of Medicine of University of South Dakota (class of 2019). In 2024 Medicare paid $7,225 for 57 patients, and Part D covered 94 of their prescriptions, 89% of them generic. Inspire Medical Systems, Inc. was the largest of 8 companies reporting payments in 2025, $1,451 in all, mostly food and beverage.
Overview
| NPI | 1902369820 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Apr 8, 2019 |
| Last updated in NPPES | Sep 3, 2024 |
| Certified by provider | Sep 3, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Otolaryngology Primary | 207Y00000X | 15720 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Otolaryngology (SD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 57 |
|---|---|
| Services billed | 106 across 19 procedure codes |
| Paid by Medicare | $7,225 |
Part D prescriptions in 2024
| Prescriptions (claims) | 94 · 106 30-day fills |
|---|---|
| Patients | 51 |
| Total drug cost | $9,443 |
| Generic share | 89% of claims |
Education and affiliations
| Medical school | Sanford School of Medicine of University of South Dakota |
|---|---|
| Graduation year | 2019 |
| Medicare specialty | Otolaryngology |
Medical group
- Monument Health Rapid City Hospital IncRapid City, SD · 564 clinicians
Hospital affiliations
- Campbell County HealthGillette, WY
- Chadron HospitalChadron, NE
- Monument Health Custer HospitalCuster, SD
- Monument Health Rapid City HospitalRapid City, SD
- Same Day Surgery Center LLCRapid City, SD
Industry payments (Open Payments)
- 2025$1,451 · 35 payments from 8 companies
- 2024$637.86 · 22 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Inspire Medical Systems, Inc. | $711.41 | 16 |
| Cochlear Americas | $326.08 | 6 |
| Aerin Medical Inc. | $139.80 | 2 |
| Genzyme Corporation | $137.17 | 7 |
| Sanofi-Aventis U.S. LLC | $52.99 | 1 |
What the 2025 payments were for
- Food and Beverage$1,398 · 34 payments
- Education$52.99 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Otolaryngology providers in Rapid City
- 1215671094
- 1861973760
- 1376520049
- 1013961978
- 1912989864
- 1033602313
- 1568081479
- 1053359398
- 1881651057
- 1164788667
- 1225695059
- 1699972000