Is I35 a billable ICD-10-CM code?

No. I35 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I35 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).

I35

I35 — Nonrheumatic aortic valve disorders

Non-billable headerICD-10-CM

I35 is a non-billable header ICD-10-CM code for nonrheumatic aortic valve disorders. It cannot be billed on its own: choose one of the more specific child codes below.

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.

aortic valve disorder of unspecified cause but with diseases of mitral and/or tricuspid valve(s) (I08.-)
aortic valve disorder specified as congenital (Q23.0, Q23.1)
aortic valve disorder specified as rheumatic (I06.-)
hypertrophic subaortic stenosis (I42.1)

Code also

Both codes may be needed to describe the encounter fully. Sequencing depends on the reason for the visit.

, if applicable, bicuspid aortic valve (Q23.81)

Risk adjustment

I35 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.

Code to one of these instead I35

5 child codes. Green means billable.

Questions about I35

Is I35 a billable ICD-10-CM code?: No. I35 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I35 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Other forms of heart disease (I30-I5A).