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- 353 Fairmont Blvd, Rapid City, SD 57701
About Dr. Duffy
Liam M. Duffy, MD practices otolaryngology in Rapid City, SD. Liam is a 2019 graduate of Sanford School of Medicine of University of South Dakota. Liam is also listed as specializing in otolaryngology (ent). According to Medicare claims data, Liam cared for 68 Medicare patients across 73 services. The services billed most often include new patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more, established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, and diagnostic exam of voice box using a flexible endoscope. The provider's National Provider Identifier (NPI) is 1902369820.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (605) 755-1000
- Email not available
Practice Locations
353 FAIRMONT BLVD
Rapid City, SD 57701
Conditions Commonly Evaluated or Treated
Within Otolaryngology generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
Balance
Ear and hearing
- Cholesteatoma
- Eustachian tube dysfunction
- Hearing loss
- Otosclerosis
- Perforated eardrum
- Swimmer's ear
Head, neck, and salivary
Nose and sinus
- Broken nose
- Deviated septum
- Loss or reduction of smell
- Nasal obstruction
- Nasal polyps
- Nosebleeds
- Seasonal allergies
Sleep and airway
Throat and voice
- Enlarged adenoids
- Globus sensation
- Hoarseness and voice change
- Laryngopharyngeal reflux
- Swallowing difficulties
- Vocal cord nodules
- Vocal cord paralysis
Cancer
Head & Neck
Throat & Voice
Procedures & services
Most searched procedures
Office diagnosis
Cosmetic
Ear & Hearing
Ear procedures
Head & Neck
Head and neck surgery
- Neck lymph-node dissection
- Parathyroid surgery
- Parotid gland surgery
- Thyroid removal surgery
- Voice-box removal
Nose & Sinus
Nose and sinus procedures
Sleep and airway
Throat & Voice
Throat, voice, and swallowing
Procedures Most Often Billed to Medicare
73 services · 68 patients · 3 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Diagnostic exam of voice box using a flexible endoscope | Procedure | 31575 |
12 | Less often than most peers in Otolaryngology |
| New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more | Office visit | 99203 |
41 | As often as other peers in Otolaryngology |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
20 | Less often than most peers in Otolaryngology |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other ENT doctors in Rapid City 8
Same specialty, same city.
Trained at Sanford School of Medicine of University of South Dakota 7
Other providers in the same specialty who trained at the same institution.
More connections — 14 related providers in 2 groups
Class of 2019 at Sanford School of Medicine of University of South Dakota 8
Providers who graduated from the same medical school in the same year.
Also performs Diagnostic exam of voice box using a flexible endoscope 6
Providers in SD who bill this service to Medicare most often.
Common questions
What does Dr. Duffy specialize in?
Dr. Duffy is an ENT doctor in Rapid City, SD. That is the designation recorded for this NPI in the federal registry, where it is listed as “Otolaryngology”.
NPI registry
Where is Dr. Duffy located?
Dr. Duffy is listed at 353 Fairmont Blvd, Rapid City, SD 57701. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
What is Dr. Duffy's phone number?
The number on file is (605) 755-1000. Contact the office directly to confirm availability and scheduling.
NPI registry
What is Dr. Duffy's NPI number?
Dr. Duffy's National Provider Identifier is 1902369820. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Duffy go to medical school?
Dr. Duffy attended Sanford School of Medicine of University of South Dakota, graduating in 2019. This comes from the CMS National Downloadable File.
CMS public data
How long has Dr. Duffy been practicing?
Dr. Duffy has 7 years experience. Calculated from a graduation year of 2019, reported in the CMS National Downloadable File.
CMS public data
What does Dr. Duffy do most often?
According to Medicare billing data, Dr. Duffy performs procedures including diagnostic exam of voice box using a flexible endoscope, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Has Dr. Duffy confirmed this information?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Duffy. If this is you, claiming it is free.
Guide.md
Guide.md listings do not constitute medical advice or an endorsement.