Is I74.9 a billable ICD-10-CM code?

Yes. I74.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does I74.9 sit in the tabular list?

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

I74.9

I74.9 — Embolism and thrombosis of unspecified artery

Billable / specific codeICD-10-CM

I74.9 is a billable, specific ICD-10-CM code for embolism and thrombosis of unspecified artery. It is valid for submission on a claim.

Excludes2 inherited from the categories above I74.9

Also inherited, and the opposite of Excludes1: these conditions are not part of I74.9, but a patient can have both, so you may code both.

Written on I74 — Arterial embolism and thrombosis

atheroembolism (I75.-)
basilar embolism and thrombosis (I63.0-I63.2, I65.1)
carotid embolism and thrombosis (I63.0-I63.2, I65.2)
cerebral embolism and thrombosis (I63.3-I63.5, I66.-)
coronary embolism and thrombosis (I21-I25)
mesenteric embolism and thrombosis (K55.0-)
ophthalmic embolism and thrombosis (H34.-)
precerebral embolism and thrombosis NOS (I63.0-I63.2, I65.9)
pulmonary embolism and thrombosis (I26.-)
renal embolism and thrombosis (N28.0)
retinal embolism and thrombosis (H34.-)
septic embolism and thrombosis (I76)
vertebral embolism and thrombosis (I63.0-I63.2, I65.0)

Risk adjustment

I74.9 risk-adjusts. Under the CMS-HCC V28 model it maps to this category:

HCC 264 Vascular Disease with Complications0.455 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.

Medicare coverage

I74.9 is named in 8 Medicare coverage policies — 8 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

A52868Billing and Coding: Transesophageal Echocardiography (TEE)
A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A52992Billing and Coding: Non-Invasive Cerebrovascular Arterial Studies
A56781Billing and Coding: Transthoracic Echocardiography (TTE)

How I74.9 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 I74.9.

Embolism(multiple) (paradoxical)
Clot›circulation
Embolism›artery
Thrombosis, thrombotic›artery, arteries(postinfectional)

Code history

I74.9 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 I74. If I74.9 is not quite right, the correct code is usually one of these.

Questions about I74.9

Is I74.9 a billable ICD-10-CM code?: Yes. I74.9 is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does I74.9 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Diseases of arteries, arterioles and capillaries (I70-I79).