G99
Header — not billableOther disorders of nervous system in diseases classified elsewhere
The ICD-10 code for other disorders of nervous system in diseases classified elsewhere is G99.
G99 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 3 more specific codes below.
Documentation support
General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.
- •This is a non-billable header code. Documentation must support a more specific child code before this diagnosis can be reported on a claim.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Related codes in this category
- G89Pain, not elsewhere classifiednon-billable header
- G90Disorders of autonomic nervous systemnon-billable header
- G91Hydrocephalusnon-billable header
- G92Toxic encephalopathynon-billable header
- G93Other disorders of brainnon-billable header
- G94Other disorders of brain in diseases classified elsewhere
- G95Other and unspecified diseases of spinal cordnon-billable header
- G96Other disorders of central nervous systemnon-billable header
- G97Intraoperative and postprocedural complications and disorders of nervous system, not elsewhere classifiednon-billable header
- G98Other disorders of nervous system not elsewhere classifiednon-billable header
- G99Other disorders of nervous system in diseases classified elsewherenon-billable header