G92.04
BillableImmune effector cell-associated neurotoxicity syndrome, grade 4
This code does not map to an HCC category in any model (V28, V24, ESRD, RxHCC).
What This Code Means
This is a severe, life-threatening neurological complication that occurs when immune cells (used in cancer treatment) cause toxic damage to the brain and nervous system. Grade 4 represents the most severe level of this condition, which can cause seizures, coma, or death.
Coding Tips
- •This code is used specifically for patients receiving CAR-T cell therapy or similar immunotherapy; always verify the grade level (1-4) documented by the physician, as each grade has a distinct code
- •Link this diagnosis to the underlying malignancy being treated and the immunotherapy procedure code to provide complete clinical context for the hospitalization
Code Hierarchy
└G92Toxic encephalopathy└G92.0Immune effector cell-associated neurotoxicity syndrome└G92.04Immune effector cell-associated neurotoxicity syndrome, grade 4
└G92.04Immune effector cell-associated neurotoxicity syndrome, grade 4