G12.21 AMYOTROPHIC LATERAL SCLEROSIS

Code Information

  • Diagnosis Code: G12.21
  • Short Description: Amyotrophic lateral sclerosis
  • Long Description: Amyotrophic lateral sclerosis
  • Code Version: 2025 ICD-10-CM

The code G12.21 is VALID for claim submission

Code Classification

This code is valid for adult diagnoses

Synonyms

  • Amyotrophic lateral sclerosis
  • Amyotrophic lateral sclerosis plus syndrome
  • Amyotrophic lateral sclerosis plus syndrome
  • Amyotrophic lateral sclerosis plus syndrome
  • Amyotrophic lateral sclerosis plus syndrome
  • Amyotrophic lateral sclerosis plus syndrome
  • Amyotrophic lateral sclerosis plus syndrome
  • Amyotrophic lateral sclerosis type 1
  • Amyotrophic lateral sclerosis type 10
  • Amyotrophic lateral sclerosis type 3
  • Amyotrophic lateral sclerosis type 4
  • Amyotrophic lateral sclerosis type 6
  • Amyotrophic lateral sclerosis type 7
  • Amyotrophic lateral sclerosis type 8
  • Amyotrophic lateral sclerosis type 9
  • Amyotrophic lateral sclerosis with autonomic dysfunction
  • Amyotrophic lateral sclerosis with cerebellar dysfunction
  • Amyotrophic lateral sclerosis with dementia
  • Amyotrophic lateral sclerosis with dementia
  • Amyotrophic lateral sclerosis with dementia
  • Amyotrophic lateral sclerosis with frontotemporal dementia
  • Amyotrophic lateral sclerosis with multiple system atrophy
  • Amyotrophic lateral sclerosis with parkinsonism
  • Amyotrophic lateral sclerosis with spinocerebellar ataxia
  • Amyotrophic lateral sclerosis, parkinsonism, dementia complex
  • Amyotrophic lateral sclerosis, parkinsonism, dementia complex of Kii Peninsula
  • Amyotrophic lateral sclerosis, parkinsonism, dementia complex of West New Guinea
  • Autosomal dominant amyotrophic lateral sclerosis type 1
  • Autosomal recessive amyotrophic lateral sclerosis type 1
  • Juvenile amyotrophic lateral sclerosis
  • Juvenile amyotrophic lateral sclerosis type 2
  • Juvenile amyotrophic lateral sclerosis type 5
  • Multiple system atrophy
  • Restrictive lung disease
  • Restrictive lung disease due to amyotrophic lateral sclerosis

Crosswalk Information

ICD-10 Code ICD-9 Code ICD-9 Description
G12.21 Right Arrow 335.20 Amyotrophic sclerosis
335.21 Prog muscular atrophy
This ICD-10 to ICD-9 data is based on the 2018 General Equivalency Mapping (GEM) files published by the Centers for Medicare & Medicaid Services (CMS) for informational purposes only. The data is not an ICD-10 conversion tool and doesn’t guarantee clinical accuracy.

Similar Codes

ICD-10 Code ICD-10 Description
G12 Spinal muscular atrophy and related syndromes
G12.0 Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]
G12.1 Other inherited spinal muscular atrophy
G12.2 Motor neuron disease
G12.20 Motor neuron disease, unspecified
G12.22 Progressive bulbar palsy
G12.23 Primary lateral sclerosis
G12.24 Familial motor neuron disease
G12.25 Progressive spinal muscle atrophy
G12.29 Other motor neuron disease
G12.8 Other spinal muscular atrophies and related syndromes
G12.9 Spinal muscular atrophy, unspecified
This page was last updated on: 10/1/2025
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