ICD-10-CM > G00-G99 > G40-G47 > G47 > G47.4 G47.4 Narcolepsy and cataplexy Non-Billable/Non-Specific Codes G47.41NarcolepsyG47.411Narcolepsy with cataplexyG47.419Narcolepsy without cataplexyG47.42Narcolepsy in conditions classified elsewhereG47.421Narcolepsy in conditions classified elsewhere with cataplexyG47.429Narcolepsy in conditions classified elsewhere without cataplexy