2020 ICD-10-CM Diagnosis Code G47.4

Narcolepsy and cataplexy

    2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
  • G47.4 should not be used for reimbursement purposes as there are multiple codes below it that contain a greater level of detail.
  • The 2020 edition of ICD-10-CM G47.4 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of G47.4 - other international versions of ICD-10 G47.4 may differ.
The following code(s) above G47.4 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to G47.4:
  • G00-G99
    2020 ICD-10-CM Range G00-G99

    Diseases of the nervous system

    Type 2 Excludes
    • certain conditions originating in the perinatal period (P04-P96)
    • certain infectious and parasitic diseases (A00-B99)
    • complications of pregnancy, childbirth and the puerperium (O00-O9A)
    • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
    • endocrine, nutritional and metabolic diseases (E00-E88)
    • injury, poisoning and certain other consequences of external causes (S00-T88)
    • neoplasms (C00-D49)
    • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
    Diseases of the nervous system
  • G47
    ICD-10-CM Diagnosis Code G47

    Sleep disorders

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Type 2 Excludes
    Sleep disorders
Code 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
Code annotations containing back-references to G47.4:
ICD-10-CM Codes Adjacent To G47.4
G47.3 Sleep apnea
G47.30 …… unspecified
G47.31 Primary central sleep apnea
G47.32 High altitude periodic breathing
G47.33 Obstructive sleep apnea (adult) (pediatric)
G47.34 Idiopathic sleep related nonobstructive alveolar hypoventilation
G47.35 Congenital central alveolar hypoventilation syndrome
G47.36 Sleep related hypoventilation in conditions classified elsewhere
G47.37 Central sleep apnea in conditions classified elsewhere
G47.39 Other sleep apnea
G47.4 Narcolepsy and cataplexy
G47.41 Narcolepsy
G47.411 …… with cataplexy
G47.419 …… without cataplexy
G47.42 Narcolepsy in conditions classified elsewhere
G47.421 …… with cataplexy
G47.429 …… without cataplexy
G47.5 Parasomnia
G47.50 …… unspecified
G47.51 Confusional arousals
G47.52 REM sleep behavior disorder

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.