G40.50
Epileptic seizures related to external causes, not intractable
G40.50 is a non-billable ICD-10-CM code header for epileptic seizures related to external causes, not intractable. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are G40.501 Epileptic seizures related to external causes, not intractable, with status epilepticus and G40.509 Epileptic seizures related to external causes, not intractable, without status epilepticus. Its coding notes include a Use additional code instruction, a Code also instruction, 5 Excludes1 entries and 12 Excludes2 entries.
Use additional code
Add the listed code as a secondary code, if known.
Code also
Two codes may be needed to describe the condition. This note gives no sequencing order.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (8 notes)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Notes
- the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled