Circadian rhythm sleep disorder, delayed sleep phase type
- G47.21 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
- The 2025 edition of ICD-10-CM G47.21 became effective on October 1, 2024.
- This is the American ICD-10-CM version of G47.21 – other international versions of ICD-10 G47.21 may differ.
Applicable To
- Delayed sleep phase syndrome
The following code(s) above G47.21 contain annotation back-references
that may be applicable to G47.21:
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.
ICD-10-CM G47.21 is grouped within Diagnostic Related Group(s) (MS-DRG v42.0):
- 011 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with mcc
- 012 Tracheostomy for face, mouth and neck diagnoses or laryngectomy with cc
- 013 Tracheostomy for face, mouth and neck diagnoses or laryngectomy without cc/mcc
- 091 Other disorders of nervous system with mcc
- 092 Other disorders of nervous system with cc
- 093 Other disorders of nervous system without cc/mcc
Convert G47.21 to ICD-9-CMCode History
- 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
- 2017 (effective 10/1/2016): No change
- 2018 (effective 10/1/2017): No change
- 2019 (effective 10/1/2018): No change
- 2020 (effective 10/1/2019): No change
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
- 2024 (effective 10/1/2023): No change
- 2025 (effective 10/1/2024): No change
Diagnosis Index entries containing back-references to G47.21:
- Delay, delayed
- sleep phase syndrome G47.21
- Disorder (of) – see also Disease
- sleepG47.9
- circadian rhythmG47.20
- delayed sleep phase type G47.21
- circadian rhythmG47.20
- sleepG47.9
- Syndrome – see also Disease
- delayed sleep phase G47.21