2020 ICD-10-CM Diagnosis Code G47.429

Narcolepsy in conditions classified elsewhere without cataplexy

    2016 2017 2018 2019 2020 Billable/Specific Code Manifestation Code
  • G47.429 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • Short description: Narcolepsy in conditions classified elsewhere w/o cataplexy
  • The 2020 edition of ICD-10-CM G47.429 became effective on October 1, 2019.
  • This is the American ICD-10-CM version of G47.429 - other international versions of ICD-10 G47.429 may differ.
ICD-10-CM Coding Rules
  • G47.429 describes the manifestation of an underlying disease, not the disease itself.
The following code(s) above G47.429 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 G47.429:
  • 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
  • G47.42
    ICD-10-CM Diagnosis Code G47.42

    Narcolepsy in conditions classified elsewhere

      2016 2017 2018 2019 2020 Non-Billable/Non-Specific Code
    Code First
    • underlying condition
    Narcolepsy in conditions classified elsewhere
Approximate Synonyms
  • Secondary narcolepsy
ICD-10-CM G47.429 is grouped within Diagnostic Related Group(s) (MS-DRG v37.0):
  • 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 G47.429 to ICD-9-CM

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

Diagnosis Index entries containing back-references to G47.429:

ICD-10-CM Codes Adjacent To G47.429
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
G47.53 Recurrent isolated sleep paralysis
G47.54 …… in conditions classified elsewhere
G47.59 Other parasomnia
G47.6 Sleep related movement disorders
G47.61 Periodic limb movement disorder
G47.62 Sleep related leg cramps

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