G40.A Absence epileptic syndrome

The ICD-10-CM code for Absence epileptic syndrome is G40.A (FY2026). It is a non-billable category code — select a more specific code below for claims.

Classification

Chapter

6: Diseases of the nervous system (G00-G99)

Section

G40-G47: Episodic and paroxysmal disorders (G40-G47)

Category G40

94 codes (58 billable)

FY2026 Status

Stable since FY2024

Also Known As

ICD-10-CM Alphabetic Index entries that lead to G40.A:

• Seizure (s) › petit mal
• Seizure (s) › absence

Inclusion Terms

• Childhood absence epilepsy [pyknolepsy]
• Juvenile absence epilepsy
• Absence epileptic syndrome, NOS

Official Coding Guidelines

Dominant/nondominant side (TOC entry)

a. Dominant/nondominant side ................................................................................................. 45

Pain - Category G89 (TOC entry)

b. Pain - Category G89.............................................................................................................. 45

Source: CMS — ICD-10-CM Official Guidelines for Coding and Reporting, FY2026

References

• CMS — ICD-10-CM Official Code Set and Guidelines, FY2026
• CDC/NCHS — ICD-10-CM Files and Browser Tool

Cite This Page

Reference G40.A with the canonical source and edition:

G40.A — Absence epileptic syndrome. ICD-10 Coding Pro (ICD-10-CM FY2026). https://icd10codingpro.com/codes/G40.A

Canonical URL: https://icd10codingpro.com/codes/G40.A