A19.0 ICD-10-CM Code: Acute miliary tuberculosis of a single specified site

A19.0 is the ICD-10-CM diagnosis code for acute miliary tuberculosis of a single specified site. 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. A19.0 sits in the ICD-10-CM chapter for certain infectious and parasitic diseases (a00-b99), within the section covering tuberculosis (a15-a19).

A19.0 is a billable ICD-10-CM code but does not map to a payment HCC under the CMS-HCC V28, V24, ESRD, or RxHCC risk adjustment models. It can be reported on Medicare Advantage encounter data submissions but it does not contribute to a beneficiary's RAF score and therefore does not affect risk-adjusted payments to the plan.

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).