ICD-10 Code G47.35 – Congenital central alveolar hypoventilation syndrome (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.35 – Congenital central alveolar hypoventilation syndrome
What it is
G47.35 identifies congenital central alveolar hypoventilation syndrome, a rare disorder in which automatic breathing control is impaired, especially during sleep. It is a congenital condition, so documentation should support onset from birth or early infancy.
Clinical signs
Clinical features vary; refer to documentation. Commonly noted findings include hypoventilation during sleep, shallow breathing, and abnormal carbon dioxide retention, with more severe breathing control problems when asleep than awake.
When to use this code
Use this code when the provider documents congenital central alveolar hypoventilation syndrome or congenital central hypoventilation syndrome. Apply it when the record clearly identifies a congenital disorder of ventilatory control, not a transient or acquired breathing problem. Check documentation if the diagnosis is uncertain.
Do not use for
Do not use this code for acquired hypoventilation, obstructive sleep apnea, or nonspecific sleep-related breathing complaints. If the chart does not confirm a congenital central cause, do not assume this diagnosis.
Coding tip
Confirm the congenital diagnosis in the provider note before assigning G47.35, especially when the record mentions sleep-related apnea or hypoventilation without a named syndrome.