ICD-10 Code G96.00 – Cerebrospinal Fluid Leak, Unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G96.00 – Cerebrospinal fluid leak, unspecified
What it is
Use this code for a cerebrospinal fluid leak when the record confirms a CSF escape but does not identify the site or cause. It indicates an unspecified leak involving the fluid surrounding the brain and spinal cord.
Clinical signs
Clinical features vary; refer to documentation. Commonly documented clues include clear drainage from the nose or ear, positional headache, or evidence of CSF on imaging or testing.
When to use this code
Assign G96.00 when the provider documents a CSF leak without specifying whether it is cranial, spinal, traumatic, or postoperative. Use it when the chart confirms the condition but lacks enough detail for a more specific code.
If later notes identify the source or cause, code the more specific diagnosis instead. Check documentation for associated procedures, surgery, or trauma that may support a different code selection.
Do not use for
Do not use this code for meningitis, headache alone, or routine postoperative drainage that is not documented as CSF. Avoid it when the leak site or cause is clearly stated and a more specific code applies.
Coding tip
Query the provider when the record says “possible” or “suspected” CSF leak and the site or etiology is unclear.