G47.21

Applicable To

• Delayed sleep phase syndrome

Approximate Synonyms

• Circadian rhythm sleep disorder, delayed sleep phase

• Sleep wake cycle disorder, delayed phase type

• Sleep-wake schedule disorder, delayed phase

• Sleep-wake schedule disorder, delayed phase type

Clinical Information

• A subtype of circadian rhythm sleep disorder in which the individual exhibits a persistent pattern of late sleep onset and late awakening, which results from an endogenous sleep-wake cycle that is delayed relative to the societal norm.

Details

• G47.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.

• The 2023 edition of ICD-10-CM G47.21 became effective on October 1, 2022.

• This is the American ICD-10-CM version of G47.21 – other international versions of ICD-10 G47.21 may differ.