G47.42

Narcolepsy in conditions classified elsewhere

Non-billable header

G47.42 is a non-billable header code. Use one of the more specific codes below.

Excludes2

Not included here — may be reported together when both conditions exist.

  • certain conditions originating in the perinatal period (P04-P96) (from G47)
  • certain infectious and parasitic diseases (A00-B99) (from G47)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A) (from G47)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from G47)
  • endocrine, nutritional and metabolic diseases (E00-E88) (from G47)
  • injury, poisoning and certain other consequences of external causes (S00-T88) (from G47)
  • neoplasms (C00-D49) (from G47)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from G47)
  • nightmares (F51.5) (from G47)
  • nonorganic sleep disorders (F51.-) (from G47)
  • sleep terrors (F51.4) (from G47)
  • sleepwalking (F51.3) (from G47)

Code first

Sequence the underlying condition first.

  • underlying condition

Parent code

  • G47.4Narcolepsy and cataplexyHeader

More specific codes G47.42

  • G47.421Narcolepsy in conditions classified elsewhere with cataplexyBillable
  • G47.429Narcolepsy in conditions classified elsewhere without cataplexyBillable

Related codes

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