G90
Header — not billableDisorders of autonomic nervous system
The ICD-10 code for disorders of autonomic nervous system is G90.
G90 is a non-billable header code. It groups related conditions but cannot be used on its own for reimbursement — select one of the 10 more specific codes below.
Clinical notes
Excludes1 (not coded here)
An Excludes1 note is a pure exclusion: the excluded condition and this code should never be reported together, because the two conditions cannot occur at the same time (e.g. a congenital form vs. an acquired form of the same disease).
- dysfunction of the autonomic nervous system due to alcohol (G31.2)
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.
- •Confirm the excluded condition(s) listed above are not also present — Excludes1 conditions cannot be coded together with this one.
- •As a general rule, code to the highest level of specificity supported by the documentation in the medical record.
Child codes under G90
- G90.0Idiopathic peripheral autonomic neuropathynon-billable header
- G90.1Familial dysautonomia [Riley-Day]
- G90.2Horner's syndrome
- G90.3Multi-system degeneration of the autonomic nervous system
- G90.4Autonomic dysreflexia
- G90.5Complex regional pain syndrome I (CRPS I)non-billable header
- G90.8Other disorders of autonomic nervous systemnon-billable header
- G90.9Disorder of the autonomic nervous system, unspecified
- G90.APostural orthostatic tachycardia syndrome [POTS]
- G90.BLMNB1-related autosomal dominant leukodystrophy
Related codes in this category
- G89Pain, not elsewhere classifiednon-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
- G90Disorders of autonomic nervous systemnon-billable header