G40.501

Epileptic seizures related to external causes, not intractable, with status epilepticus

Risk-adjusting (HCC)Billable code

HCC risk adjustment mapping

CMS-HCC V28

HCC201

Seizure Disorders and Convulsions

CMS-HCC ESRD V24

HCC79

Seizure Disorders and Convulsions

RxHCC V08

RXHCC164

Epilepsy and Other Seizure Disorders, Except Intractable Epilepsy

Coding notes

Excludes 1 never coded together · Excludes 2 may co-exist

Inherited from G40.5Epileptic seizures related to external causes
Use additional

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)

Code also

, if applicable, associated epilepsy and recurrent seizures (G40.-)

Synonyms

Epileptic seizures related to alcohol Epileptic seizures related to drugs Epileptic seizures related to hormonal changes Epileptic seizures related to sleep deprivation Epileptic seizures related to stress

Inherited from G40Epilepsy and recurrent seizures
Excludes 1

conversion disorder with seizures (F44.5) convulsions NOS (R56.9) post traumatic seizures (R56.1) seizure (convulsive) NOS (R56.9) seizure of newborn (P90)

Excludes 2

hippocampal sclerosis (G93.81) mesial temporal sclerosis (G93.81) temporal sclerosis (G93.81) Todd's paralysis (G83.84)

Note

the following terms are to be considered equivalent to intractable: pharmacoresistant (pharmacologically resistant), treatment resistant, refractory (medically) and poorly controlled

Inherited from chapter 6Diseases of the nervous system
Excludes 2

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)

Official Guidelines for G40.501

FY 2026 ›