ICD-10 Code G96.0 – Cerebrospinal fluid leak (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G96.0 – Cerebrospinal fluid leak
What it is
Cerebrospinal fluid leak means CSF is escaping from the dura or another normal containment site. The leak may be cranial or spinal and can cause low-pressure symptoms.
Clinical signs
Clinical features vary; refer to documentation. Common findings include clear fluid drainage, positional headache, or symptoms linked to intracranial hypotension. Imaging or fluid testing may support the diagnosis.
When to use this code
Use G96.0 when the provider documents a cerebrospinal fluid leak, CSF fistula, or confirmed CSF escape from the skull or spine. Code it when the leak is the condition being evaluated or treated.
Choose this code based on documented evidence, not on headache alone. If the record only suggests a possible leak, check documentation before assigning the code.
Do not use for
Do not use this code for nonspecific headache, nasal drainage without confirmed CSF, or postoperative fluid collection unless the provider identifies a CSF leak. Check documentation.
Coding tip
Look for the provider’s exact wording and any site details, because documentation may distinguish cranial from spinal leak.