ICD-10 Code A19.1 – Acute miliary tuberculosis of multiple sites (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A19.1 – Acute miliary tuberculosis of multiple sites
What it is
A19.1 identifies acute miliary tuberculosis affecting multiple sites. Use it when documentation shows widespread, acute TB involvement rather than disease limited to one organ.
Clinical signs
Clinical features vary; refer to documentation. Common references describe systemic illness with evidence of disseminated tuberculosis involving more than one site, often confirmed by imaging, pathology, or microbiology.
When to use this code
Use this code when the provider documents acute miliary tuberculosis with multiple organ or site involvement. It also fits when the record clearly states disseminated TB across several sites and no more specific site code is reported.
If the note only says tuberculosis without acute miliary or multiple-site detail, check documentation before assigning A19.1. Code the documented primary site instead when the disease is localized.
Do not use for
Do not use A19.1 for latent TB, pulmonary TB limited to one site, or nonspecific tuberculosis without acute miliary spread. Check documentation if the record does not confirm multiple sites.
Coding tip
Match the code to explicit provider wording; “miliary” and “multiple sites” should both be supported in the record.