ICD-10 Code G12.20 – Motor neuron disease, unspecified (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G12.20 – Motor neuron disease, unspecified
What it is
G12.20 identifies motor neuron disease when the record does not specify a particular type. It refers to a progressive disorder affecting motor neurons and causing loss of voluntary muscle control.
Clinical signs
Typical findings include progressive weakness, muscle wasting, and impaired speech, swallowing, or breathing. Clinical features vary; refer to documentation.
When to use this code
Use this code when the clinician documents motor neuron disease but does not name a more specific diagnosis. It also fits when the note states an unspecified motor neuron disorder and no further detail is available. Check documentation before coding a more specific form.
Do not use for
Do not use this code if the record identifies a specific motor neuron disease subtype, such as amyotrophic lateral sclerosis or another named condition. Do not use it for weakness alone without a documented diagnosis.
Coding tip
Query the provider if the note suggests a specific motor neuron disease but only “unspecified” is documented.