ICD-10-CM Alphabetic Index · FY 2026 26 Entries
Convulsions in the ICD-10-CM Index ICD-10-CM
The main term Convulsions (idiopathic) carries 26 index entries pointing to 13 ICD-10-CM codes. The default entry is R56.9, the code the bare main term maps to; every indented line below refines the term by site, cause, or type. Verify any candidate code in the Tabular List before using it.
✓ Built from the official CMS FY 2026 index fileEffective Oct 1, 2025 – Sep 30, 2026
26
Index Entries
13
Codes Referenced
R56.9
Default Code
C
Letter
26 of 26 shown
ICD-10-CM
Index Entries Under Convulsions 26 entries · 13 codes
Convulsions (idiopathic) R56.9
apoplectiform (cerebral ischemia) I67.82
dissociative F44.5
epileptic see Epilepsy
epileptiform, epileptoid see Epilepsy
ether (anesthetic) see Table of Drugs and Chemicals, by drug
febrile R56.00
with status epilepticus G40.901
complex R56.01
with status epilepticus G40.901
simple R56.00
hysterical F44.5
infantile P90
epilepsy see Epilepsy
jacksonian see Epilepsy, localization-related, symptomatic, with simple partial seizures
myoclonic G25.3
newborn P90
obstetrical (nephritic) (uremic) see Eclampsia
paretic A52.17
post traumatic R56.1
psychomotor see Epilepsy, localization-related, symptomatic, with complex partial seizures
recurrent R56.9
reflex R25.8
scarlatinal A38.8
tetanus, tetanic see Tetanus
thymic E32.8
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Related Index Terms
Source: Centers for Medicare & Medicaid Services, FY 2026 ICD-10-CM Index to Diseases and Injuries release files, effective October 1, 2025 through September 30, 2026.
