Use additional code to identify presence of:
alcohol abuse and dependence (F10.-)
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
hypertension (I10-I1A)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Excludes1

  • traumatic intracranial hemorrhage (S06.-)
  1. I65 Occlusion and stenosis of precerebral arteries, not resulting in cerebral infarction

    Includes:

    • embolism of precerebral artery
    • narrowing of precerebral artery
    • obstruction (complete) (partial) of precerebral artery
    • thrombosis of precerebral artery

    Excludes1

    • insufficiency, NOS, of precerebral artery (G45.-)
    • insufficiency of precerebral arteries causing cerebral infarction (I63.0-I63.2)
    1. I65.0 Occlusion and stenosis of vertebral artery

      1. I65.01 Occlusion and stenosis of right vertebral artery

      2. I65.02 Occlusion and stenosis of left vertebral artery

      3. I65.03 Occlusion and stenosis of bilateral vertebral arteries

      4. I65.09 Occlusion and stenosis of unspecified vertebral artery

    2. I65.1 Occlusion and stenosis of basilar artery

    3. I65.2 Occlusion and stenosis of carotid artery

      1. I65.21 Occlusion and stenosis of right carotid artery

      2. I65.22 Occlusion and stenosis of left carotid artery

      3. I65.23 Occlusion and stenosis of bilateral carotid arteries

      4. I65.29 Occlusion and stenosis of unspecified carotid artery

    4. I65.8 Occlusion and stenosis of other precerebral arteries

    5. I65.9 Occlusion and stenosis of unspecified precerebral artery

      Inclusion term(s):

      • Occlusion and stenosis of precerebral artery NOS
Abbreviations used here:

NEC Not elsewhere classifiable
This abbreviation in the Tabular List represents “other specified”. When a specific code is not available for a condition, the Tabular List includes an NEC entry under a code to identify the code as the “other specified” code.

NOS Not otherwise specified
This abbreviation is the equivalent of unspecified.