ICD-10 Code G47.34 – Idiopathic sleep related nonobstructive alveolar hypoventilation (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.34 – Idiopathic sleep related nonobstructive alveolar hypoventilation
What it is
This code identifies a sleep-related breathing disorder in which breathing is too shallow during sleep, causing reduced ventilation without airway obstruction. “Idiopathic” means the cause is not known.
Clinical signs
Clinical features may include sleep-related hypoventilation, daytime sleepiness, morning headaches, or unexplained fatigue. Diagnostic findings should show nonobstructive alveolar hypoventilation during sleep; if uncertain, check documentation.
When to use this code
Use G47.34 when the provider documents idiopathic sleep-related nonobstructive alveolar hypoventilation as the diagnosis. It is appropriate when the record supports a sleep-related hypoventilation disorder and does not identify another cause. If the cause is secondary or obstructive, use the documented condition instead.
Do not use for
Do not use this code for obstructive sleep apnea, central sleep apnea, or hypoventilation clearly due to another disease or medication. Check documentation if the chart does not clearly state the idiopathic, nonobstructive form.
Coding tip
Confirm that the provider links the hypoventilation to sleep and documents it as idiopathic before assigning G47.34.