G90.9
Disorder of the autonomic nervous system, unspecified
BillableComplete code, valid to report
G90.9 (also written G909) is a billable ICD-10-CM diagnosis code for disorder of the autonomic nervous system, unspecified. It is part of the FY2027 code set, effective October 1, 2026. It is one of the 21 codes in category G90 (Disorders of autonomic nervous system). The Alphabetic Index lists it under 15 entries. Its coding notes include 1 Excludes1 entry and 8 Excludes2 entries.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
Inherited from Chapter 6 Diseases of the nervous system
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 15 entries
- Degeneration, degenerative, nervous system, autonomic
- Disease, diseased, nervous system, autonomic
- Disease, diseased, nervous system, parasympathetic
- Disease, diseased, nervous system, sympathetic
- Disease, diseased, nervous system, vegetative
- Disease, diseased, peripheral, autonomic nervous system
- Disease, diseased, sympathetic nervous system
- Disorder (of), autonomic nervous system
- Disorder (of), nerve, sympathetic
- Disorder (of), nervous system, autonomic (peripheral)
- Disorder (of), nervous system, parasympathetic
- Disorder (of), nervous system, sympathetic