Is I28 a billable ICD-10-CM code?

No. I28 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does I28 sit in the tabular list?

Diseases of the circulatory system (I00-I99), in the block Pulmonary heart disease and diseases of pulmonary circulation (I26-I28).

I28

I28 — Other diseases of pulmonary vessels

Non-billable headerICD-10-CM

I28 is a non-billable header ICD-10-CM code for other diseases of pulmonary vessels. It cannot be billed on its own: choose one of the more specific child codes below.

Risk adjustment

I28 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 I28

4 child codes. Green means billable.

I28.0Arteriovenous fistula of pulmonary vessels
I28.1Aneurysm of pulmonary artery
I28.8Other diseases of pulmonary vessels
I28.9Disease of pulmonary vessels, unspecified

Questions about I28

Is I28 a billable ICD-10-CM code?: No. I28 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I28 sit in the tabular list?: Diseases of the circulatory system (I00-I99), in the block Pulmonary heart disease and diseases of pulmonary circulation (I26-I28).