Is Q27 a billable ICD-10-CM code?

No. Q27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does Q27 sit in the tabular list?

Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).

Q27

Q27 — Other congenital malformations of peripheral vascular system

Non-billable headerICD-10-CM

Q27 is a non-billable header ICD-10-CM code for other congenital malformations of peripheral vascular system. 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.

anomalies of cerebral and precerebral vessels (Q28.0-Q28.3)
anomalies of coronary vessels (Q24.5)
anomalies of pulmonary artery (Q25.5-Q25.7)
congenital retinal aneurysm (Q14.1)
hemangioma and lymphangioma (D18.-)

Other codes that can never be billed with Q27

These codes carry an Excludes1 note pointing at Q27. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading Q27 alone.

N28.0Ischemia and infarction of kidney
P02.69Newborn affected by other conditions of umbilical cord
Q27.8Other specified congenital malformations of peripheral vascular system
Q28Other congenital malformations of circulatory system
I77.0Arteriovenous fistula, acquired

Risk adjustment

Q27 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 Q27

7 child codes. Green means billable.

Questions about Q27

Is Q27 a billable ICD-10-CM code?: No. Q27 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does Q27 sit in the tabular list?: Congenital malformations, deformations and chromosomal abnormalities (Q00-QA0), in the block Congenital malformations of the circulatory system (Q20-Q28).