ICD-10 Code G12.29 – Other motor neuron disease (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G12.29 – Other motor neuron disease
What it is
G12.29 identifies motor neuron disease that does not fit a more specific ICD-10-CM category. It is used for disorders affecting motor neurons and causing progressive weakness, when documentation supports a different motor neuron disease diagnosis.
Clinical signs
Clinical features vary; refer to documentation. Common findings in motor neuron disease include progressive muscle weakness, muscle wasting, and signs of upper or lower motor neuron involvement.
When to use this code
Use this code when the clinician documents a motor neuron disease that is not otherwise classified in the record. It may apply when the chart names an atypical or unspecified motor neuron disorder but still clearly indicates motor neuron involvement. If the diagnosis is incomplete, check documentation before coding.
Do not use for
Do not use this code for amyotrophic lateral sclerosis, spinal muscular atrophy, or other more specific motor neuron diagnoses. If the condition is only suspected or not documented as confirmed, do not assign G12.29.
Coding tip
Look for the exact neurologic diagnosis in the assessment, and code the most specific motor neuron disorder documented.