Is I67.5 a billable ICD-10-CM code?

Yes. I67.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I67.5 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).

What cannot be coded together with I67.5?

I67.5 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I67.5 (I67) and apply to it just the same.

I67.5

I67.5 — Moyamoya disease

Billable / specific codeICD-10-CM

I67.5 is a billable, specific ICD-10-CM code for moyamoya disease. It is valid for submission on a claim.

Excludes1 inherited from the categories above I67.5

These are not written on I67.5, but they bind it: a note on a category applies to every code beneath it. Billing I67.5 with anything listed here is a denial.

Written on I67 — Other cerebrovascular diseases

Occlusion and stenosis of cerebral artery causing cerebral infarction (I63.3-I63.5-)
Occlusion and stenosis of precerebral artery causing cerebral infarction (I63.2-)

Excludes2 inherited from the categories above I67.5

Also inherited, and the opposite of Excludes1: these conditions are not part of I67.5, but a patient can have both, so you may code both.

Written on I67 — Other cerebrovascular diseases

sequelae of the listed conditions (I69.8)

Risk adjustment

I67.5 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

I67.5 is named in 13 Medicare coverage policies — 13 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A56551Billing and Coding: Visual Fields Testing
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 I67.5 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 I67.5.

Encephaloduroarteriomyosynangiosis(EDAMS)
Moyamoya disease
Nishimoto disease(-Takeuchi)
Disease, diseased›moyamoya
Disease, diseased›Nishimoto(-Takeuchi)

Code history

I67.5 has not changed since FY2024 — no addition, revision or deletion across the three most recent ICD-10-CM releases.

Related codes at this level

Codes that share I67. If I67.5 is not quite right, the correct code is usually one of these.

Questions about I67.5

Is I67.5 a billable ICD-10-CM code?: Yes. I67.5 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I67.5 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Cerebrovascular diseases (I60-I69).
What cannot be coded together with I67.5?: I67.5 carries Excludes1 notes, which means the conditions they list can never be coded together with it on the same encounter. Some are written on the categories above I67.5 (I67) and apply to it just the same.