I63.9

I63.9: Cerebral infarction, unspecified

Billable / specific codeICD-10-CM

I63.9 is a billable, specific ICD-10-CM code for cerebral infarction, unspecified. It is valid for submission on a claim.

Check I63.9 with the rest of the claim: free scrubber

Excludes2: not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

transient cerebral ischemic attacks and related syndromes (G45.-)

Inclusion terms

Alternative wordings a physician may use in the chart for this same code.

Stroke NOS

Excludes1 inherited from the categories above I63.9

A category’s note binds every code beneath it.

Written on I63: Cerebral infarction

neonatal cerebral infarction (P91.82-)

Excludes2 inherited from the categories above I63.9

Not part of this code, but both may be coded when both are present.

Written on I63: Cerebral infarction

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

Other codes that can never be billed with I63.9

Their own Excludes1 notes name this code, so the conflict is not listed above.

P91.82Neonatal cerebral infarction

Risk adjustment

I63.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 249 Ischemic or Unspecified Stroke0.239 RAF

Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.

Medicare coverage

I63.9 is named in 30 Medicare coverage policies: 30 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.

A52868Billing and Coding: Transesophageal Echocardiography (TEE)
A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A56476Billing and Coding: Cardiac Radionuclide Imaging
A56612Billing and Coding: CT of the Head

Alphabetic index entries that lead here

PRIND(Prolonged reversible ischemic neurologic deficit)
RIND(reversible ischemic neurologic deficit)
Stroke(apoplectic) (brain) (ischemic) (paralytic)
Accident›cerebrovascular(ischemic)
Accident›craniovascular
Accident›vascular, brain
Deficit›prolonged reversible ischemic neurologic(PRIND)
Stroke›cerebrovascular(ischemic)
Stroke›cryptogenic
Stroke›in evolution
Stroke›unspecified(NOS)
Accident›cerebrovascular›aborted

Code history

Unchanged in every release from FY2024 to FY2027.