Specific code icon 2015 ICD-10-CM Diagnosis Code G47.21

Circadian rhythm sleep disorder, delayed sleep phase type

    2015 Billable Code

  • G47.21 is a billable ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • On October 1, 2015 ICD-10-CM will replace ICD-9-CM in the United States, therefore, G47.21 - and all other ICD-10-CM codes - should only be used for training or planning purposes until then.
  • This is the American ICD-10-CM version of G47.21. Other international ICD-10 versions may differ.

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.
Applicable To
  • Delayed sleep phase syndrome
Description Synonyms
  • Circadian rhythm sleep disorder, delayed sleep phase
  • Sleep disorder, circadian rhythm, delayed phase
  • Sleep wake cycle disorder, delayed phase type
  • Sleep-wake schedule disorder, delayed phase
  • Sleep-wake schedule disorder, delayed phase type
ICD-10-CM G47.21 is grouped within Diagnostic Related Group(s) (MS-DRG v30.0):
  • 011 Tracheostomy for face,mouth & neck diagnoses with mcc
  • 012 Tracheostomy for face,mouth & neck diagnoses with cc
  • 013 Tracheostomy for face,mouth & neck diagnoses 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 ICD-10-CM G47.21 to ICD-9-CM

The following ICD-10-CM Index entries contain back-references to ICD-10-CM G47.21: