A19.0

What This Code Means

This is a severe form of tuberculosis where the infection spreads rapidly throughout the body, affecting a single specific organ or site. The disease gets its name from the millet seed-like appearance of the tiny lesions it creates.

Coding Tips

• •Verify the specific site of infection is documented in the medical record, as 'single specified site' requires identification of the affected organ (e.g., lung, bone, meninges)
• •Distinguish between A19.0 (single site) and A19.1 (multiple sites) or A19.9 (unspecified) based on clinical documentation to ensure accurate code selection