Disturbances of smell and taste (R43) ICD-10-CM
The R43 code range covers disturbances of smell and taste with 6 ICD-10-CM diagnosis codes. 5 of them are billable and valid for claim submission in fiscal year 2026, and the category headers group them but cannot themselves be billed.
Codes in the R43 Range 6 codes · 5 billable
Clinical Terms in This Code Range
Definitions from the National Library of Medicine for conditions coded in the R43 range.
Anosmia
Complete or severe loss of the subjective sense of smell. Loss of smell may be caused by many factors such as a cold, allergy, OLFACTORY NERVE DISEASES, viral RESPIRATORY TRACT INFECTIONS (e.g., COVID-19), aging and various neurological disorders (e.g., ALZHEIMER DISEASE).
About the R43 Code Range
ICD-10 code R43 covers various disturbances of smell and taste, including conditions like anosmia, parosmia, and parageusia. These codes are used to document disorders that affect a person's sense of smell or taste, helping healthcare providers specify the exact type of sensory impairment.
The code R43.0 refers to anosmia, commonly known as loss of smell or disorder of smell, including congenital forms. Codes like R43.1 identify parosmia, where smells are perceived abnormally or unpleasantly, often described as things smelling different or unusual. R43.2 covers parageusia, which involves altered or unpleasant taste sensations and can be called abnormal taste in the mouth or taste sense altered. Other smell and taste disturbances, such as metallic or lingering tastes, fall under R43.8. When the specific nature of the disturbance is not identified, R43.9 is used for unspecified disorders of smell and taste, which can include sensory disorders caused by radiation or other factors. These codes provide precise terminology for documenting sensory issues related to smell and taste in medical records and billing.
Questions About This Page
How many billable codes are in the R43 range?
Of the 6 codes in this range, 5 are billable and valid for claim submission from October 1, 2025 through September 30, 2026. Category header codes group them but cannot be reported on claims.
What does the R43 range classify?
The range classifies disturbances of smell and taste. Each code links to its own reference page with billing status, MS-DRG grouping, coding notes, and clinical information.
Related References
Source: CMS FY 2026 ICD-10-CM Tabular List and order file, effective October 1, 2025 through September 30, 2026.
