G47.419 Narcolepsy without cataplexy

Billable ICD-10-CM code, FY2026.

Applicable to

• Narcolepsy NOS

Applies from G47 Sleep disorders

Excludes2 (not included here)

• nightmares (F51.5)
• nonorganic sleep disorders (F51.-)
• sleep terrors (F51.4)
• sleepwalking (F51.3)

Risk adjustment (HCC)

• RxHCC V08: HCC 355 — Narcolepsy and Cataplexy

MS-DRG index

Defines the logic of DRG(s) 091-093 in MDC 01.

Approximate ICD-9-CM (GEMs)

• 347.00 Narcolepsy, without cataplexy

Code annotations containing back-references to G47.419

Back-references to G47.4

• Type 2 Excludes: F51.1 Hypersomnia not due to a substance or known physiological condition ("narcolepsy (G47.4-)")

Back-references to G47

• Type 2 Excludes: F51 Sleep disorders not due to a substance or known physiological condition ("organic sleep disorders (G47.-)")

Diagnosis Index entries for G47.419

• Gélineau's syndrome
• Narcolepsy
• Syndrome › Gelineau's

Nearby codes

• G47.37 Central sleep apnea in conditions classified elsewhere
• G47.39 Other sleep apnea
• G47.4 Narcolepsy and cataplexy
• G47.41 Narcolepsy
• G47.411 Narcolepsy with cataplexy
• G47.419 Narcolepsy without cataplexy (this code)
• G47.42 Narcolepsy in conditions classified elsewhere
• G47.421 Narcolepsy in conditions classified elsewhere with cataplexy
• G47.429 Narcolepsy in conditions classified elsewhere without cataplexy
• G47.5 Parasomnia
• G47.50 Parasomnia, unspecified