2008 ICD-9-CM Volume 1 Diagnosis Codes Home > Diseases Of The Nervous System And Sense Organs 320-389 > Other Disorders Of The Central Nervous System 340-349 > Epilepsy 345.* > 2008 ICD-9-CM Diagnosis 345.1 Generalized convulsive epilepsy  On October 1, 2008 the 2009 ICD-9-CM codes came into effect. Therefore, this code may be out of date. The 2009 version of ICD-9-CM 345.1 can be accessed here. A clinically diverse group of epilepsy syndromes characterized either by myoclonic seizures or by myoclonus in association with other seizure types. Myoclonic epilepsy syndromes are divided into three subtypes based on etiology: familial, cryptogenic, and symptomatic (i.e., occurring secondary to known disease processes such as infections, hypoxic-ischemic injuries, trauma, etc.). A generalized seizure disorder characterized by recurrent major motor seizures. The initial brief tonic phase is marked by trunk flexion followed by diffuse extension of the trunk and extremities. The clonic phase features rhythmic flexor contractions of the trunk and limbs, pupillary dilation, elevations of blood pressure and pulse, urinary incontinence, and tongue biting. This is followed by a profound state of depressed consciousness (post-ictal state) which gradually improves over minutes to hours. The disorder may be cryptogenic, familial, or symptomatic (caused by an identified disease process). (From Adams et al., Principles of Neurology, 6th ed, p329) 345.1 is a non-specific code that cannot be used to specify a diagnosis 345.1 contains 14 index entries View the ICD-9-CM Volume 1 345.* hierarchy ICD9Data's sister site ProcedureCodes.com launches with the 2008/09 CPT® codes - read more on the ICD9Data.com blog. 345.1 also known as: Epileptic seizures: clonic myoclonic tonic tonic-clonic Grand mal Major epilepsy 345.1 excludes: convulsions: NOS (780.39) infantile (780.39) newborn (779.0) infantile spasms (345.6) Index entries containing 345.1: Attack myoclonic (see also Epilepsy) 345.1 Epilepsy, epileptic (idiopathic) 345.9 clonic 345.1 generalized 345.9 convulsive 345.1 flexion 345.1 grand mal (idiopathic) 345.1 major (motor) 345.1 musicogenic 345.1 myoclonus, myoclonic 345.1 progressive (familial) 333.2 reflex 345.1 tonic (-clonic) 345.1 Grand mal (idiopathic) (see also Epilepsy) 345.1 hysteria of Charcôt 300.11 nonrecurrent or isolated 780.39 Haut mal (see also Epilepsy) 345.1 Lennox-Gastaut syndrome 345.0 with tonic seizures 345.1 Syndrome - see also Disease Lennox-Gastaut syndrome 345.0 with tonic seizures 345.1