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ICD-10-CM Codes
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G00-G99
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G40-G47
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G47-
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2023 ICD-10-CM Diagnosis Code G47.421
2023 ICD-10-CM Diagnosis Code G47.421
Narcolepsy in conditions classified elsewhere with cataplexy
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Manifestation Code
- G47.421 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 G47.421 became effective on October 1, 2022.
- This is the American ICD-10-CM version of G47.421 - other international versions of ICD-10 G47.421 may differ.
ICD-10-CM Coding Rules
- G47.421 describes the manifestation of an underlying disease, not the disease itself.
The following code(s) above
G47.421 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
G47.421:
- G00-G99
2023 ICD-10-CM Range G00-G99
Diseases of the nervous systemType 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)
- G47
ICD-10-CM Diagnosis Code G47
Sleep disorders
2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
- G47.42
ICD-10-CM Diagnosis Code G47.42
Narcolepsy in conditions classified elsewhere
2016 2017 2018 2019 2020 2021 2022 2023 Non-Billable/Non-Specific Code
- Secondary cataplexy and narcolepsy
- Secondary narcolepsy with cataplexy
ICD-10-CM G47.421 is grouped within Diagnostic Related Group(s) (MS-DRG v40.0):
- 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 G47.421 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
- 2021 (effective 10/1/2020): No change
- 2022 (effective 10/1/2021): No change
- 2023 (effective 10/1/2022): No change
- Narcolepsy G47.419
ICD-10-CM Diagnosis Code G47.419
Narcolepsy without cataplexy
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code
- in conditions classified elsewhere G47.429
ICD-10-CM Diagnosis Code G47.429
Narcolepsy in conditions classified elsewhere without cataplexy
2016 2017 2018 2019 2020 2021 2022 2023 Billable/Specific Code Manifestation Code
ICD-10-CM Codes Adjacent To G47.421
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
G47.4 Narcolepsy and cataplexy
G47.42 Narcolepsy in conditions classified elsewhere
G47.421
…… with cataplexy
G47.52 REM sleep behavior disorder
G47.53 Recurrent isolated sleep paralysis
G47.54 …… in conditions classified elsewhere
G47.6 Sleep related movement disorders
G47.61 Periodic limb movement disorder
Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.
