ICD-10 Code for Convulsions
Also indexed as (idiopathic)
The ICD-10-CM code for convulsions is R56.9 — Unspecified convulsions. This is the code the Alphabetic Index gives for convulsions with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
R56.9 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which convulsions code should you use?
The Alphabetic Index lists 13 codes under Convulsions. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| apoplectiform | I67.82 | Cerebral ischemia | |
| dissociative | F44.5 | Conversion disorder with seizures or convulsions | |
| febrile | R56.00 | Simple febrile convulsions | |
| hysterical | F44.5 | Conversion disorder with seizures or convulsions | |
| infantile | P90 | Convulsions of newborn | |
| myoclonic | G25.3 | Myoclonus | |
| newborn | P90 | Convulsions of newborn | |
| paretic | A52.17 | General paresis | |
| post traumatic | R56.1 | Post traumatic seizures | |
| recurrent | R56.9 | Unspecified convulsions | |
| reflex | R25.8 | Other abnormal involuntary movements | |
| scarlatinal | A38.8 | Scarlet fever with other complications | |
| thymic | E32.8 | Other diseases of thymus |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources