Is I77.75 a billable ICD-10-CM code?

Yes. I77.75 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I77.75 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).

I77.75

I77.75 — Dissection of other precerebral arteries

Billable / specific codeICD-10-CM

I77.75 is a billable, specific ICD-10-CM code for dissection of other precerebral arteries. It is valid for submission on a claim.

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.

aneurysm of carotid artery (I72.0)
aneurysm of other precerebral arteries (I72.5)
aneurysm of vertebral artery (I72.6)
dissection of carotid artery (I77.71)
dissection of vertebral artery (I77.74)

Inclusion terms

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

Dissection of basilar artery (trunk)

Risk adjustment

I77.75 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

Medicare coverage

I77.75 is named in 10 Medicare coverage policies — 10 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52850Billing and Coding: Cardiac Catheterization and Coronary Angiography
A56612Billing and Coding: CT of the Head
A56631Billing and Coding: Thoracic Aortography and Carotid, Vertebral, and Subclavian Angiography
A56722Billing and Coding: Intraoperative Neurophysiological Testing

How I77.75 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to I77.75.

Dissection›artery›basilar(trunk)
Dissection›artery›precerebral›specified site NEC

Related codes at this level

Codes that share I77.7. If I77.75 is not quite right, the correct code is usually one of these.

Questions about I77.75

Is I77.75 a billable ICD-10-CM code?: Yes. I77.75 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I77.75 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).