ICD-10-CM 2027 diagnosis code

L05.9Pilonidal cyst and sinus without abscess

Not billable — use a more specific code

L05.9 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About L05.9

L05.9 is the ICD-10-CM diagnosis code for pilonidal cyst and sinus without abscess. It belongs to category L05 (pilonidal cyst and sinus), block L00-L08 (infections of the skin and subcutaneous tissue) and chapter 12 (diseases of the skin and subcutaneous tissue). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within L05, choose L05.9 (without abscess) only when documentation doesn't support a more specific option: with abscess (L05.0).

To report this condition, pick the subcode that matches the documentation: L05.91 (abscess) and L05.92 (abscess).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under L05.9

Notes that apply from higher levels

Instructions written at a parent level also apply to L05.9.

Broader instructions also apply from L00-L08 Infections of the skin and subcutaneous tissue and Chapter 12: Diseases of the skin and subcutaneous tissue.

Code history

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2027

FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
No changes since FY2016.

Common questions about L05.9

Is L05.9 billable?: No. L05.9 is a header code. Report one of its more specific subcodes instead.