ICD-10 Code A19 – Miliary tuberculosis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A19 – Miliary tuberculosis
What it is
A19 identifies miliary tuberculosis, a form of tuberculosis with widespread dissemination through the bloodstream. It reflects generalized infection rather than a single localized site.
Clinical signs
Clinical features vary; refer to documentation. Common findings include fever, weight loss, night sweats, cough, and signs of multi-organ involvement on imaging or examination.
When to use this code
Use A19 when the provider documents miliary tuberculosis or disseminated TB affecting multiple organs. It is appropriate when the record clearly identifies this specific pattern of tuberculosis, even if the exact primary site is not emphasized.
Check documentation if the note only says tuberculosis, pulmonary TB, or latent infection. Code A19 only when the diagnosis is explicitly stated or clearly supported by the record.
Do not use for
Do not use A19 for localized pulmonary tuberculosis, latent tuberculosis infection, or a history of TB without active disease. If documentation is unclear, check documentation.
Coding tip
Look for the word “miliary” or “disseminated” in the provider note before assigning A19.