Dr. Liam M. Duffy, MD
ENT (Otolaryngology) (Otolaryngology Physician)
353 Fairmont Blvd
Rapid City, SD 57701
Who else practices at this address →
Pennington County is a federal mental health shortage area. About shortage areas
- Medicare participating
At a glance
- Medical school
- Sanford School of Medicine of University of South Dakota (2019)
- Years since graduation
- 7
- In the NPI registry since
- 2019
- Medicare patients seen, 2024
- 57
The NPI date is when this clinician registered for a National Provider Identifier, the billing number used on health claims. It is not a license, graduation or board-certification date. What an NPI is
Education and training
- 2019Medical school: Sanford School of Medicine of University of South Dakota
- 2019Registered with an NPI (national billing number; not a license date)
Undergraduate school, residency, fellowship, licensing exams and board certification aren’t in public federal data. Board certification can be confirmed with the certifying board (ABMS member boards for MDs, AOA boards for DOs).
Specialties and state licenses
-
Otolaryngology Physician primary
SD license 15720
As reported to the NPI registry. To confirm a license is current, check the state medical board.
Where they work
Hospitals
- Monument Health Rapid City Hospital Rapid City, SD
- Campbell County Health Gillette, WY
- Monument Health Custer Hospital Custer, SD
- Chadron Hospital Chadron, NE
- Same Day Surgery Center LLC Rapid City, SD
Medical groups
- Monument Health Rapid City Hospital Inc (564 clinicians)
Hospitals this clinician lists with Medicare, and groups they bill Medicare through (Care Compare). Affiliation doesn’t mean they see patients at every location.
Medicare patients and services
- Medicare patients, 2024
- 57
- Services billed
- 106
- Patients’ average age
- 73
Medicare fee-for-service only. CMS leaves out services billed for fewer than 11 patients. These figures describe a practice’s Medicare work; they aren’t a measure of quality.
Medicare prescriptions
| Drug | Prescriptions |
|---|---|
| Ondansetron Odt (ondansetron) Other prescribers in Rapid City, SD | 18 |
| Oxycodone Hcl Other prescribers in Rapid City, SD | 14 |
Prescriptions filled under Medicare Part D, including refills. CMS leaves out drugs prescribed fewer than 11 times.
Payments from drug and device companies
In 2025, 8 companies reported 35 payments worth $1,451 in total to this clinician.
| Inspire Medical Systems, Inc. | $711 |
|---|---|
| Cochlear Americas | $326 |
| Aerin Medical Inc. | $140 |
| Genzyme Corporation | $137 |
| Sanofi-aventis U.S. LLC | $52.99 |
| Integra Lifesciences Corporation | $44.17 |
| Janssen Biotech, Inc. | $20.38 |
| Smith+nephew, Inc. | $18.57 |
| Food and Beverage | $1,398 |
|---|---|
| Education | $52.99 |
What the payments were for
| Company | What it was for | Amount |
|---|---|---|
| Sanofi-aventis U.S. LLC Oct 9, 2025 | Education DUPIXENT · Immunology · in-kind | $52.99 |
Each payment as the company reported it, with the products it named. Meals are counted in the totals above but not listed one by one.
From CMS Open Payments. A payment is not evidence of wrongdoing; many are for consulting, teaching or meals. Clinicians can review and dispute their records with CMS.