8B11.5 Cerebral ischaemic stroke of unknown cause International Classification of Diseases for Mortality and Morbidity Statistics, 11th Revision, v2025-01 This is a sudden loss of brain function due to a lack of adequate blood flow. It is of an uncertain nature, and approximately 30% of examined events fall into this category.
inclusions sections/codes in this section (8B11.5-8B11.5) coding note If an additional code is used for anatomy, the artery affected by the stroke should be selected.
postcoordination Add Stem and/or Extension codes to form a cluster code which adds detail to the condition.
Laterality - only one may be selected [select] XK9J Bilateral XK8G Left XK9K Right XK70 Unilateral, unspecified Specific anatomy - multiple selections are allowed [select] XA13S2 Cerebral artery – XA1VB0 Anterior cerebral artery – XA2K99 Basilar artery –– XA3185 Pontine branches of the basilar artery – XA2JH8 Middle cerebral artery – XA4WT4 Anterolateral central artery – XA7C50 Posterior cerebral artery Has manifestation - multiple selections are allowed [select] 8B26 Vascular syndromes of brain in cerebrovascular diseases – 8B26.0 Brainstem stroke syndrome – 8B26.1 Cerebellar stroke syndrome – 8B26.2 Middle cerebral artery syndrome – 8B26.3 Anterior cerebral artery syndrome – 8B26.4 Posterior cerebral artery syndrome – 8B26.5 Lacunar syndromes – 8B26.Y Other specified vascular syndromes of brain in cerebrovascular diseases – 8B26.Z Vascular syndromes of brain in cerebrovascular diseases, unspecified –– 8B26.50 Pure motor lacunar syndrome –– 8B26.51 Pure sensory lacunar syndrome –– 8B26.5Y Other specified lacunar syndromes –– 8B26.5Z Lacunar syndromes, unspecified –– MB50 Tetraplegia ––– MB50.0 Flaccid tetraplegia ––– MB50.1 Spastic tetraplegia ––– MB50.Z Tetraplegia, unspecified –– MB51 Diplegia of upper extremities ––– MB51.0 Flaccid diplegia of upper extremities ––– MB51.1 Spastic diplegia of upper extremities ––– MB51.Z Diplegia of upper extremities, unspecified –– MB52 Diplegia of lower extremities –– MB53 Hemiplegia ––– MB53.0 Alternating hemiplegia ––– MB53.1 Flaccid hemiplegia ––– MB53.2 Spastic hemiplegia ––– MB53.Z Hemiplegia, unspecified –– MB54 Monoplegia of upper extremity ––– MB54.0 Flaccid monoplegia of upper extremity ––– MB54.1 Spastic monoplegia of upper extremity ––– MB54.Z Monoplegia of upper extremity, unspecified –– MB55 Monoplegia of lower extremity ––– MB55.0 Flaccid monoplegia of lower extremity ––– MB55.1 Spastic monoplegia of lower extremity ––– MB55.Z Monoplegia of lower extremity, unspecified –– MB56 Paraplegia –– MB57 Functional level of injury of spinal cord ––– MB57.0 Functional level of injury of cervical spinal cord ––– MB57.1 Functional level of injury of thoracic spinal cord ––– MB57.2 Functional level of injury of lumbar spinal cord ––– MB57.3 Functional level of injury of spinal cord, sacrum ––– MB57.Y Other specified functional level of injury of spinal cord ––– MB57.Z Functional level of injury of spinal cord, unspecified –– MB5Y Other specified paralytic symptoms –– MB5Z Paralytic symptoms, unspecified
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