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I27

I27Other pulmonary heart diseases

Non-billable headerICD-10-CM

I27 is a non-billable header ICD-10-CM code for other pulmonary heart diseases. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with I27

These codes carry an Excludes1 note pointing at I27. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading I27 alone.

  • M41Scoliosis
  • I26Pulmonary embolism
  • I27.0Primary pulmonary hypertension
  • I27.2Other secondary pulmonary hypertension

Risk adjustment

I27 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 I27

5 child codes. Green means billable.

Questions about I27

Is I27 a billable ICD-10-CM code?
No. I27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does I27 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).
ICD-10-CMFY2026-Apr· effective April 1, 2026

Loaded directly from the CMS/NCHS ICD-10-CM public-domain release — see data sources and our editorial policy. If this page disagrees with the CMS tabular list, this page is wrong. Reference information for professional coders; not medical or billing advice.