G12.23 Primary lateral sclerosis

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)

• 335.24 Primary lateral sclerosis

Diagnosis Index entries for G12.23

• Paralysis, paralytic (complete) (incomplete) › lateral
• Sclerosis, sclerotic › lateral (amyotrophic) (descending) (spinal) › primary
• Sclerosis, sclerotic › primary, lateral
• Sclerosis, sclerotic › spinal (cord) (progressive) › lateral (amyotrophic) › progressive

Nearby codes

• G12.1 Other inherited spinal muscular atrophy
• G12.2 Motor neuron disease
• G12.20 Motor neuron disease, unspecified
• G12.21 Amyotrophic lateral sclerosis
• G12.22 Progressive bulbar palsy
• G12.23 Primary lateral sclerosis (this code)
• 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