ICD-10 Code A17.89 – Other Tuberculosis of Nervous System (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A17.89 – Other tuberculosis of nervous system
What it is
A17.89 identifies tuberculosis involving the nervous system that does not fit a more specific ICD-10 category. Use it when documentation confirms CNS tuberculosis, but the exact site is described only as other or unspecified nervous system involvement.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe neurologic findings such as headache, meningismus, cranial nerve deficits, altered mental status, seizures, or focal deficits when tuberculosis affects the central nervous system.
When to use this code
Use this code when the provider documents tuberculosis of the nervous system and does not specify a more precise site, such as meninges or spinal cord. It also fits cases labeled “other” nervous system tuberculosis in the record. Confirm the diagnosis is active tuberculosis, not only exposure or history.
Do not use for
Do not use A17.89 when the record supports a more specific CNS tuberculosis code, such as tuberculous meningitis. Do not assign it for latent TB infection, screening, or a past history of tuberculosis without current disease.
Coding tip
Check documentation for the exact CNS site first; if it is named, code the more specific tuberculosis category instead of this “other” code.