ICDcodes.org
FY2027

I63.5 — Cerebral infarction due to unspecified occlusion or stenosis of cerebral arteries

Not billable

Is I63.5 billable?

No — I63.5 is a non-billable header code. I63.5 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 18 billable codes beneath I63.5.

Billable codes under this header

I63.5 at a glance

CodeI63.5
DescriptionCerebral infarction due to unspecified occlusion or stenosis of cerebral arteries
BillableNo — header code
Code setICD-10-CM FY2027
Valid for encountersOctober 1, 2026 – September 30, 2027

How is I63.5 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to I63.5. They show the wording a clinician may have documented, which often differs from the Tabular description.

  • Occlusion, occluded › cerebrovascular › with infarction
  • Softening › brain › occlusive
  • Occlusion, occluded › artery › brain or cerebral › with infarction
  • Infarct, infarction › cerebral › due to › occlusion NEC › cerebral arteries
  • Infarct, infarction › cerebral › due to › stenosis NEC › cerebral arteries

Excludes1 — never code together — inherited from I60-I69

The conditions below can never be reported together with I63.5 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • traumatic intracranial hemorrhage (S06.-)

Excludes1 — never code together — inherited from I63

The conditions below can never be reported together with I63.5 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

  • neonatal cerebral infarction (P91.82-)

Use additional code — inherited from I60-I69

Report an additional code alongside I63.5 to fully describe the condition. I63.5 is sequenced first.

  • 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)

Use additional code — inherited from I63

Report an additional code alongside I63.5 to fully describe the condition. I63.5 is sequenced first.

  • code, if applicable, to identify status post administration of tPA (rtPA) in a different facility within the last 24 hours prior to admission to current facility (Z92.82)
  • code, if known, to indicate National Institutes of Health Stroke Scale (NIHSS) score (R29.7-)

Excludes2 — not included here — inherited from Chapter 9

The conditions below are not part of I63.5, but a patient may have both at the same time. When documentation supports it, I63.5 and the excluded code may both be reported.

  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Excludes2 — not included here — inherited from I63

The conditions below are not part of I63.5, but a patient may have both at the same time. When documentation supports it, I63.5 and the excluded code may both be reported.

  • chronic, without residual deficits (sequelae) (Z86.73)
  • sequelae of cerebral infarction (I69.3-)

What codes fall under I63.5? (6)

How long has I63.5 existed?

I63.5 has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.

Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.

Which codes are confused with I63.5?

ICD-10-CM declares these codes mutually exclusive with I63.5 — exactly one of each pair can be correct for a given encounter.

What other codes are in the I63 family? (8)