All ICD10 Codes

G40-G47

Non-Billable
ChapterG00–G99
Rankblock
Description

Episodic and paroxysmal disorders (G40-G47)

About ICD-10-CM code G40-G47

Episodic and paroxysmal disorders (G40-G47) is classified in ICD-10-CM as code G40-G47, part of G00-G99 Diseases of the Nervous System. Its status is non-billable, meaning reporting it requires a deeper, more specific code.

Use a more specific code (0 billable, 6 non-billable)
G40Epilepsy and recurrent seizureshas subcodesG43Migrainehas subcodesG44Other headache syndromeshas subcodesG45Transient cerebral ischemic attacks and related syndromeshas subcodesG46Vascular syndromes of brain in cerebrovascular diseaseshas subcodesG47Sleep disordershas subcodes
Metadata & Insights
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 6: Diseases of the Nervous System (G00-G99).

CH6 Parent Instructions

Excludes2(Not included here. Code separately if applicable.)
  • 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)

Clinical Hierarchy

BillableHas subcodes
CH6Diseases of the nervous system (G00-G99)
G40-G47Episodic and paroxysmal disorders (G40-G47)Not billable
G40Epilepsy and recurrent seizuresSubcodes
G43MigraineSubcodes
G44Other headache syndromesSubcodes
G45Transient cerebral ischemic attacks and related syndromesSubcodes
G46Vascular syndromes of brain in cerebrovascular diseasesSubcodes
G47Sleep disordersSubcodes

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to G40-G47:

chapterCH6
Diseases of the nervous system (G00-G99)
View context instructions

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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