G36.0Neuromyelitis optica [Devic]

G36.0 is the ICD-10-CM diagnosis code for Neuromyelitis optica [Devic]. It belongs to category G36 (other acute disseminated demyelination), block G35-G37 (demyelinating diseases of the central nervous system) and chapter 6 (diseases of the nervous system). It is billable, so it can be reported on its own for dates of service from October 1, 2026 through September 30, 2027.

Within G36 (other acute disseminated demyelination), G36.0 is specifically for Neuromyelitis optica [Devic]. Related codes cover acute and subacute hemorrhagic leukoencephalitis [Hurst] (G36.1), other specified acute disseminated demyelination (G36.8) and acute disseminated demyelination, unspecified (G36.9).

The conditions in its Excludes2 note aren't part of G36.0, but may be coded alongside it if the patient has both: optic neuritis NOS (H46).

As a secondary diagnosis it is a CC (complication or comorbidity), which can move an inpatient stay into the "with CC" MS-DRG of its family, unless the principal diagnosis excludes it.

In MS-DRG v44.0, it is part of the grouping logic for DRG 058 (Multiple Sclerosis and Cerebellar Ataxia with MCC, relative weight 1.8438), DRG 059 (Multiple Sclerosis and Cerebellar Ataxia with CC, relative weight 1.2002) and DRG 060 (Multiple Sclerosis and Cerebellar Ataxia without CC/MCC, relative weight 0.9247), in MDC 01 (Diseases and Disorders of the Nervous System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Before ICD-10, this condition was coded in ICD-9-CM as 341.0 (Neuromyelitis optica).