ICD-10 Code A19.9 – Miliary Tuberculosis, Unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A19.9 – Miliary tuberculosis, unspecified
What it is
Miliary tuberculosis is a form of disseminated tuberculosis in which infection spreads through the bloodstream to many organs. Use A19.9 when the record documents miliary TB but does not identify a specific organ or complication.
Clinical signs
Clinical features vary; refer to documentation. Common findings include systemic illness with fever, weight loss, cough, and widespread disease on imaging or examination, but the chart must support the miliary pattern.
When to use this code
Use this code when the provider diagnoses miliary tuberculosis and no more specific site, such as lung or central nervous system involvement, is documented. It also fits when the note says “miliary TB” without further detail. Check documentation if the record is unclear.
Do not use for
Do not use A19.9 for localized tuberculosis or when a more specific miliary TB code is documented. Do not code it from a suspected diagnosis alone.
Coding tip
Code the documented miliary pattern first, then verify whether any additional TB manifestations or confirmed sites require separate coding.