G13
Systemic atrophies primarily affecting central nervous system in diseases classified elsewhere
G13 is a non-billable ICD-10-CM code category for systemic atrophies primarily affecting central nervous system in diseases classified elsewhere. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are G13.0 Paraneoplastic neuromyopathy and neuropathy, G13.1 Other systemic atrophy primarily affecting central nervous system in neoplastic disease, G13.2 Systemic atrophy primarily affecting the central nervous system in myxedema and G13.8 Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhere. Its coding notes include 8 Excludes2 entries.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- 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)
More specific codes under G13 4
- G13.0Paraneoplastic neuromyopathy and neuropathyBillable
- G13.1Other systemic atrophy primarily affecting central nervous system in neoplastic diseaseBillable
- G13.2Systemic atrophy primarily affecting the central nervous system in myxedemaBillable
- G13.8Systemic atrophy primarily affecting central nervous system in other diseases classified elsewhereBillable