ICD-10 Code G47.23 – Circadian rhythm sleep disorder, irregular sleep wake type (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code G47.23 – Circadian rhythm sleep disorder, irregular sleep wake type
What it is
This code identifies a circadian rhythm sleep disorder marked by an irregular sleep-wake pattern. Sleep occurs in multiple short periods across day and night rather than in one consolidated nighttime block.
Clinical signs
Typical documentation may describe fragmented sleep, frequent naps, and difficulty maintaining a consistent sleep schedule. Clinical features vary; refer to documentation for the specific pattern and associated daytime impairment.
When to use this code
Use G47.23 when the provider documents irregular sleep-wake type circadian rhythm sleep disorder, including cases with repeated daytime sleep episodes and nighttime wakefulness. It may also apply when the chart clearly describes a non-24-hour consolidated sleep pattern. Check documentation if the diagnosis is only suspected or if another sleep disorder better explains the symptoms.
Do not use for
Do not use this code for ordinary insomnia, poor sleep hygiene, or sleep loss from shift work unless the provider specifically diagnoses irregular sleep-wake type. If the record does not support the circadian disorder, check documentation.
Coding tip
Code only when the provider names the disorder or documents a matching circadian pattern; vague sleep complaints alone are not enough.