ICD-10 Code G47.22 – Circadian rhythm sleep disorder, advanced sleep phase type (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.22 – Circadian rhythm sleep disorder, advanced sleep phase type
What it is
G47.22 identifies advanced sleep phase type circadian rhythm sleep disorder. It means a person falls asleep and wakes much earlier than desired, creating a persistent mismatch between sleep timing and daily schedule.
Clinical signs
Typical features include early evening sleepiness, very early morning awakening, and difficulty staying awake late in the day. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record specifically documents advanced sleep phase type circadian rhythm sleep disorder. It fits patients whose sleep timing is consistently advanced and causes impairment, distress, or trouble maintaining a normal schedule. If the note only says insomnia or poor sleep, check documentation.
Do not use for
Do not use G47.22 for nonspecific insomnia, sleep deprivation, or general fatigue without a documented circadian rhythm disorder. Do not assume this diagnosis when the sleep complaint is not clearly linked to an advanced phase pattern.
Coding tip
Confirm that the provider names the advanced sleep phase type; if the timing pattern is unclear, check documentation before assigning G47.22.