Nocardiosis (A43)

ICD-10 code A43 is used to classify infections caused by the Nocardia bacteria, known collectively as nocardiosis. This group of codes specifies different forms of nocardiosis, including infections affecting the lungs, skin, and other parts of the body.

More specifically, A43.0 refers to pulmonary nocardiosis, also called nocardial pneumonia, which is a bacterial lung infection. A43.1 codes for cutaneous nocardiosis, involving skin and soft tissue infections, sometimes known as primary cutaneous nocardiosis or related actinomycetoma infections caused by various Nocardia species. Code A43.8 captures other forms of nocardiosis, such as abdominal abscesses or infections of the brain like meningitis or encephalitis. Finally, A43.9 is for unspecified nocardiosis cases, including infections that occur alongside immunodeficiency conditions like AIDS. Using these codes helps healthcare providers accurately identify and document the specific site and nature of nocardiosis infection for diagnosis and treatment.