G40
Epilepsy and recurrent seizures
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 17 never code together
G40code
Excludes1
G00-G99chapter
Excludes2
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 1
G40code
Notes
- the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled
Index entries leading here filed at null
No alphabetic index entry points at this code.
Subordinate codes 11
G40.0 Local-rel (focal) idio epilepsy w seizures of loc onset G40.1 Local-rel (focal) symptc epilepsy w simple partial seizures G40.2 Local-rel (focal) symptc epilepsy w complex partial seizures G40.3 Generalized idiopathic epilepsy and epileptic syndromes G40.A Absence epileptic syndrome G40.B Juvenile myoclonic epilepsy [impulsive petit mal] G40.C Lafora progressive myoclonus epilepsy G40.4 Other generalized epilepsy and epileptic syndromes G40.5 Epileptic seizures related to external causes G40.8 Other epilepsy and recurrent seizures G40.9 Epilepsy, unspecified
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.