Is L05 a billable ICD-10-CM code?

No. L05 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does L05 sit in the tabular list?

Diseases of the skin and subcutaneous tissue (L00-L99), in the block Infections of the skin and subcutaneous tissue (L00-L08).

L05

L05 — Pilonidal cyst and sinus

Non-billable headerICD-10-CM

L05 is a non-billable header ICD-10-CM code for pilonidal cyst and sinus. It cannot be billed on its own: choose one of the more specific child codes below.

Other codes that can never be billed with L05

These codes carry an Excludes1 note pointing at L05. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading L05 alone.

Q43.6Congenital fistula of rectum and anus
Q82Other congenital malformations of skin
L02.3Cutaneous abscess, furuncle and carbuncle of buttock

Risk adjustment

L05 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 L05

2 child codes. Green means billable.

Questions about L05

Is L05 a billable ICD-10-CM code?: No. L05 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does L05 sit in the tabular list?: Diseases of the skin and subcutaneous tissue (L00-L99), in the block Infections of the skin and subcutaneous tissue (L00-L08).