G40.11 – Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable

ICD-10-CM 2027 diagnosis code · Episodic and paroxysmal disorders

Non-billable header

ICD-10-CM code G40.11
Code
G40.11 (claims format: G4011)
Description
Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable
Short description
Local-rel (focal) symptc epi w simple partial seiz, ntrct
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
6. Diseases of the nervous system (G00-G99)
Block
G40-G47 Episodic and paroxysmal disorders
Parent codes
G40 › G40.1

Billable codes under G40.11

G40.11 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

G40 – Epilepsy and recurrent seizures

Excludes1 (not coded here):
  • conversion disorder with seizures (F44.5)
  • convulsions NOS (R56.9)
  • post traumatic seizures (R56.1)
  • seizure (convulsive) NOS (R56.9)
  • seizure of newborn (P90)
Excludes2 (not included here):
Notes:
  • the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

G40.1 – Localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures

Applicable to:
  • Attacks without alteration of consciousness
  • Epilepsia partialis continua [Kozhevnikof]
  • Simple partial seizures developing into secondarily generalized seizures

Related codes in G40.1

Frequently asked questions

What is ICD-10 code G40.11?

G40.11 is the ICD-10-CM code for localization-related (focal) (partial) symptomatic epilepsy and epileptic syndromes with simple partial seizures, intractable, in the block G40-G47 (Episodic and paroxysmal disorders).

Is G40.11 a billable code?

No. G40.11 is a header code with more specific child codes; report one of the billable codes listed above.

What category does G40.11 belong to?

It belongs to category G40 – Epilepsy and recurrent seizures.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.