ICD-10 Code G47.13 – Recurrent hypersomnia (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.13 – Recurrent hypersomnia
What it is
G47.13 identifies recurrent hypersomnia, a sleep disorder marked by repeated episodes of excessive sleepiness. The condition comes and goes, with periods of normal alertness between episodes.
Clinical signs
Typical findings include recurring episodes of prolonged sleep, difficulty staying awake, and reduced daytime alertness. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents recurrent hypersomnia or a recurrent pattern of excessive sleepiness. It fits cases where the diagnosis is established and the episodes are not better described by another sleep disorder.
Code from the medical record, not from a single complaint of fatigue or drowsiness. If the note only says “sleepiness” without a diagnosis, check documentation.
Do not use for
Do not use this code for general fatigue, insomnia, or sleepiness due to another documented cause. If the record points to a different sleep disorder, code that condition instead.
Coding tip
Confirm that the provider documents recurrent hypersomnia as a diagnosis, not just a symptom, before assigning G47.13.