ICD-10-CM 2027 diagnosis code
G40.2Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures
G40.2 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.Short description: Local-rel (focal) symptc epilepsy w complex partial seizures
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 G40.2
G40.2 is the ICD-10-CM diagnosis code for Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures. 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 (epilepsy and recurrent seizures), G40.2 is specifically for Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures. Related codes cover Localization-related (focal) (partial) idiopathic epilepsy and epileptic syndromes with seizures of localized onset (G40.0), Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures (G40.1), generalized idiopathic epilepsy and epileptic syndromes (G40.3), other generalized epilepsy and epileptic syndromes (G40.4), epileptic seizures related to external causes (G40.5), other epilepsy and recurrent seizures (G40.8), epilepsy, unspecified (G40.9), absence epileptic syndrome (G40.A) and 2 more.
To report this condition, pick the subcode that matches the documentation: G40.20 (not intractable) and G40.21 (intractable).
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 G40.2
- G40.20Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable
- G40.201Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, with status epilepticusBillable
- G40.209Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, not intractable, without status epilepticusBillable
- G40.21Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable
- G40.211Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, with status epilepticusBillable
- G40.219Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with complex partial seizures, intractable, without status epilepticusBillable
Coding notes
- Attacks with alteration of consciousness, often with automatisms
- Complex partial seizures developing into secondarily generalized seizures
Notes that apply from higher levels
Instructions written at a parent level also apply to G40.2.
› 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.
Codes whose notes reference G40.2
- G40.0Excludes1
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 G40.2
Is G40.2 billable?
- No. G40.2 is a header code. Report one of its more specific subcodes instead.