ICD-10-CM · Chapter 6 · G00–G99
G12.21
Amyotrophic lateral sclerosis
Diseases of the nervous system
Quick facts
- Code
- G12.21
- Type
- Billable code
- ICD-10-CM chapter
- Chapter 6 — Diseases of the nervous system
- Category
- G12 — Spinal muscular atrophy and related syndromes
- Specificity
- 5 characters
How coders use this code
ICD-10-CM G12.21 is a billable, fully specified code, so it can be reported directly on a claim to document a diagnosis of amyotrophic lateral sclerosis. Coders assign it when the chart documentation supports this level of detail, always matching to the most specific code available and verifying against the chapter-specific guidelines published annually by NCHS/CMS.
Related codes in G12
- G12Spinal muscular atrophy and related syndromes
- G12.0Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]
- G12.1Other inherited spinal muscular atrophy
- G12.2Motor neuron disease
- G12.20Motor neuron disease, unspecified
- G12.22Progressive bulbar palsy
- G12.23Primary lateral sclerosis
- G12.24Familial motor neuron disease
- G12.25Progressive spinal muscle atrophy
- G12.29Other motor neuron disease
- G12.8Other spinal muscular atrophies and related syndromes
- G12.9Spinal muscular atrophy, unspecified
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