2027 ICD-10-CM Diagnosis Code L05Pilonidal cyst and sinus

ICD-10-CM Codes›L00–L99›L00-L08›L05

ICD-10-CM L05
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

L05 is a non-billable ICD-10-CM category code for pilonidal cyst and sinus, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L05.01, L05.02, L05.91, and L05.92.

Code Identity

ICD-10-CM Code
L05
Billable Status
No — Non-Billable Category
Code Describes
Pilonidal cyst and sinus
Short Description
Pilonidal cyst and sinus
Same as the full description in the CMS dataset.
Chapter
L00-L08
Infections of the skin and subcutaneous tissue

Code Classification

ChapterL00–L99Diseases of the skin and subcutaneous tissue
SectionL00-L08Infections of the skin and subcutaneous tissue
CategoryL05Pilonidal cyst and sinus
This CodeL05Pilonidal cyst and sinus

Specific Coding for Pilonidal cyst and sinusOverview

Non-specific codes like L05 require more characters. Use one of these billable codes instead:

  • L05.0 for Pilonidal cyst and sinus with abscess

  • Use L05.01 for Pilonidal cyst with abscess

  • Use L05.02 for Pilonidal sinus with abscess

  • L05.9 for Pilonidal cyst and sinus without abscess

  • Use L05.91 for Pilonidal cyst without abscess

  • Use L05.92 for Pilonidal sinus without abscess

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to L05: its own notes plus those printed at block L00-L08 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

From Block L00-L08 Infections of the skin and subcutaneous tissue applies to 159 codes
  • hordeolum (H00.0)
  • infective dermatitis (L30.3)
  • local infections of skin classified in Chapter 1
  • lupus panniculitis (L93.2)
  • panniculitis NOS (M79.3)
  • panniculitis of neck and back (M54.0-)
  • Perlèche NOS (K13.0)
  • Perlèche due to candidiasis (B37.0)
  • Perlèche due to riboflavin deficiency (E53.0)
  • pyogenic granuloma (L98.0)
  • relapsing panniculitis [Weber-Christian] (M35.6)
  • viral warts (B07.-)
  • zoster (B02.-)
From Chapter 12 (L00-L99) Diseases of the skin and subcutaneous tissue applies to 1,001 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • lipomelanotic reticulosis (I89.8)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • viral warts (B07.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

From Block L00-L08 Infections of the skin and subcutaneous tissue applies to 159 codes
  • code (B95-B97) to identify infectious agent.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name L05, its category, or a range that includes it.

Excludes1 2

These codes carry an Excludes1 note naming L05: they are not reported together with it, unless the two conditions are unrelated.

  • Q43.6 Congenital fistula of rectum and anus
    pilonidal fistula or sinus (L05.-)
  • Q82 Other congenital malformations of skin
    pilonidal cyst or sinus (L05.-)

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Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About L05Overview

What is the ICD-10 code for pilonidal cyst and sinus?

L05 is the ICD-10-CM category for pilonidal cyst and sinus, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is L05 (Pilonidal cyst and sinus) a billable code?

No. This is a category header that groups the codes for pilonidal cyst and sinus, and headers cannot be submitted on claims. Claims for pilonidal cyst and sinus need a more specific code from this category, such as L05.01, L05.02, and L05.91.