G47.42
Non-Billable
ChapterG00–G99
Ranksubcategory
Official Description
Narcolepsy in conditions classified elsewhere
Metadata & Insights
- •2026 ICD-10-CM Edition - Effective October 1, 2025.
- •Non-billable category (requires more specific sub-code).
- •Chapter 6: Diseases of the Nervous System (G00-G99).
Instructional Notes
Code First
- underlying condition
General instructions are available for the parent sections:
Clinical Hierarchy
CH6Diseases of the nervous system (G00-G99)
G40-G47Episodic and paroxysmal disorders (G40-G47)
G47Sleep disorders
G47.4Narcolepsy and cataplexy
G47.42Narcolepsy in conditions classified elsewhere
G47.421Narcolepsy in conditions classified elsewhere with cataplexy
G47.429Narcolepsy in conditions classified elsewhere without cataplexy
Applicable Ancestor Context
The following parent sections contain instructions or notes that apply to G47.42:
Alphabetic Index Mentions
These are Diagnosis Index lookup paths that route to G47.42. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.
2 raw paths
Narcolepsy2 unique routes
MS-DRG Classification
No direct MS-DRG triggers identified.
Cross Reference
Find Procedures (ICD-10-PCS)
Find surgical and procedural codes related to Narcolepsy in conditions classified elsewhere.
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