G12.20 Motor neuron disease, unspecified

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Risk adjustment (HCC)

• CMS-HCC V28: HCC 190 — Amyotrophic Lateral Sclerosis and Other Motor Neuron Disease, Spinal Muscular Atrophy
• CMS-HCC V22: HCC 73 — Amyotrophic Lateral Sclerosis and Other Motor Neuron Disease
• RxHCC V08: HCC 154 — Amyotrophic Lateral Sclerosis and Other Motor Neuron Disease
• ESRD V24: HCC 73

MS-DRG index

Defines the logic of DRG(s) 056-057 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 335.29 Other motor neuron disease (approximate)

Diagnosis Index entries for G12.20

• Atrophy, atrophic (of) › spinal (acute) (cord) › paralysis
• Disease, diseased › motor neuron (bulbar) (mixed type) (spinal)

Nearby codes

• 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 (this code)
• G12.21 Amyotrophic lateral sclerosis
• G12.22 Progressive bulbar palsy
• G12.23 Primary lateral sclerosis
• G12.24 Familial motor neuron disease
• G12.25 Progressive spinal muscle atrophy