ICD-10 Code A18.83 – Tuberculosis of digestive tract organs, not elsewhere classified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A18.83 – Tuberculosis of digestive tract organs, not elsewhere classified
What it is
This code identifies tuberculosis involving digestive tract organs when the site is not specified elsewhere. Use it for documented TB infection of gastrointestinal organs beyond the more specific digestive-site codes.
Clinical signs
Clinical features vary; refer to documentation. Findings may include abdominal pain, weight loss, fever, or evidence of tuberculous involvement in a digestive organ confirmed by imaging, pathology, or clinician assessment.
When to use this code
Assign this code when the record clearly states tuberculosis of a digestive tract organ and no more specific ICD-10-CM code fits. It is appropriate for nonspecific or otherwise unclassified digestive-site TB documentation. If the note names a specific organ or another TB site, code that diagnosis instead.
Do not use for
Do not use it for pulmonary tuberculosis, latent TB infection, or gastrointestinal symptoms without documented tuberculosis. Also avoid it when the chart identifies a more specific digestive organ or site.
Coding tip
Code from the exact provider wording and check for a more specific digestive-site TB code before using A18.83.