ICD-10-CM 2027 diagnosis code

G12.2Motor neuron disease

Not billable — use a more specific code

G12.2 is a header code, so it can't be reported by itself. Choose one of the 7 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About G12.2

G12.2 is the ICD-10-CM diagnosis code for motor neuron disease. It belongs to category G12 (spinal muscular atrophy and related syndromes), block G10-G14 (systemic atrophies primarily affecting the central nervous system) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 7 subcodes must be used instead.

Within G12 (spinal muscular atrophy and related syndromes), G12.2 is specifically for motor neuron disease. Related codes cover infantile spinal muscular atrophy, type I [Werdnig-Hoffman] (G12.0), other inherited spinal muscular atrophy (G12.1), other spinal muscular atrophies and related syndromes (G12.8) and spinal muscular atrophy, unspecified (G12.9).

To report this condition, pick the subcode that matches the documentation: G12.20 (unspecified), G12.21 (sclerosis), G12.22 (palsy), G12.23 (sclerosis), G12.24 (disease), G12.25 (atrophy) and G12.29 (disease).

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

Specific codes under G12.2

Notes that apply from higher levels

Instructions written at a parent level also apply to G12.2.

Broader instructions also apply from Chapter 6: Diseases of the nervous system.

Code history

2016
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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about G12.2

Is G12.2 billable?: No. G12.2 is a header code. Report one of its more specific subcodes instead.