G12.0 Infantile spinal muscular atrophy, type I [Werdnig-Hoffman]

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 72 — Spinal Cord Disorders/Injuries
• RxHCC V08: HCC 155 — Spinal Cord Disorders
• ESRD V24: HCC 72

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 335.0 Werdnig-Hoffmann disease

Diagnosis Index entries for G12.0

• Atrophy, atrophic (of) › muscle, muscular (diffuse) (general) (idiopathic) (primary) › infantile spinal
• Atrophy, atrophic (of) › muscle, muscular (diffuse) (general) (idiopathic) (primary) › progressive (bulbar) › infantile (spinal)
• Atrophy, atrophic (of) › muscle, muscular (diffuse) (general) (idiopathic) (primary) › progressive (bulbar) › spinal › infantile
• Atrophy, atrophic (of) › muscle, muscular (diffuse) (general) (idiopathic) (primary) › spinal › infantile, type I (Werdnig-Hoffmann)
• Atrophy, atrophic (of) › Werdnig-Hoffmann
• Disease, diseased › Werdnig-Hoffmann
• Syndrome › Hoffmann-Werdnig
• Syndrome › Werdnig-Hoffman
• Werdnig-Hoffmann syndrome (muscular atrophy)

Nearby codes

• G12 Spinal muscular atrophy and related syndromes
• G12.0 Infantile spinal muscular atrophy, type I [Werdnig-Hoffman] (this code)
• 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