ICD-10 Code A18.85 – Tuberculosis of spleen (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A18.85 – Tuberculosis of spleen
What it is
A18.85 identifies tuberculosis involving the spleen, usually as part of disseminated or extrapulmonary TB. Use it when documentation states splenic tuberculosis or TB infection of the spleen.
Clinical signs
Clinical features vary; refer to documentation. Reported findings may include splenic enlargement, abdominal pain, fever, weight loss, or imaging evidence of splenic lesions consistent with tuberculosis.
When to use this code
Use this code when the provider documents tuberculosis of the spleen, whether confirmed by pathology, imaging, or other clinical assessment. It may also apply when splenic TB is listed as a diagnosed extrapulmonary manifestation. If the record only says suspected TB, check documentation before coding.
Do not use for
Do not use A18.85 for nonspecific splenomegaly, splenic abscess, or tuberculosis limited to another site without spleen involvement. Check documentation if the spleen is mentioned only as part of generalized TB.
Coding tip
Verify that the spleen is specifically named as the TB site before assigning A18.85.