ICD-10 Code A43.8 – Other forms of nocardiosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A43.8 – Other forms of nocardiosis
What it is
A43.8 identifies nocardial infection that does not fit the more specific nocardiosis codes. Use it when documentation confirms Nocardia involvement, but the site or form is described as other or unspecified.
Clinical signs
Clinical features vary; refer to documentation. Nocardiosis may present with localized or disseminated infection, and the record should support Nocardia as the cause.
When to use this code
Use this code when the clinician documents nocardiosis without a more specific anatomic site or syndrome. It also fits cases labeled “other forms” of nocardiosis in the assessment or discharge summary. If the record names a different infectious agent, do not code A43.8.
Do not use for
Do not use this code for suspected nocardiosis without confirmation in the documentation. Avoid it when a more specific nocardiosis code is available or when the infection is caused by another organism.
Coding tip
Check the final diagnosis and organism wording carefully; code the most specific nocardiosis option supported by the record.