ICD-10-CM 2027 diagnosis code
G40.B0Juvenile myoclonic epilepsy, not intractable
G40.B0 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.
Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data
About G40.B0
G40.B0 is the ICD-10-CM diagnosis code for juvenile myoclonic epilepsy, not intractable. It belongs to category G40 (epilepsy and recurrent seizures), block G40-G47 (episodic and paroxysmal disorders) and chapter 6 (diseases of the nervous system). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.
Within G40.B (juvenile myoclonic epilepsy [impulsive petit mal]), G40.B0 is specifically for juvenile myoclonic epilepsy, not intractable. Related codes cover intractable (G40.B1).
To report this condition, pick the subcode that matches the documentation: G40.B01 (with status epilepticus) and G40.B09 (without status epilepticus).
It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.
Specific codes under G40.B0
Notes that apply from higher levels
Instructions written at a parent level also apply to G40.B0.
› From G40 Epilepsy and recurrent seizures
- the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Broader instructions also apply from Chapter 6: Diseases of the nervous system.
Code history
- 2016
- 2017
- 2018
- 2019
- 2020
- 2021
- 2022
- 2023
- 2024
- 2025
- 2026
- 2027
- FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
- No changes since FY2016.
Common questions about G40.B0
Is G40.B0 billable?
- No. G40.B0 is a header code. Report one of its more specific subcodes instead.