L05 – Pilonidal cyst and sinus

ICD-10-CM 2027 diagnosis code · Infections of the skin and subcutaneous tissue

Non-billable header

ICD-10-CM code L05
Code
L05 (claims format: L05)
Description
Pilonidal cyst and sinus
Billable
No – use a more specific code below
Valid for
Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter
12. Diseases of the skin and subcutaneous tissue (L00-L99)
Block
L00-L08 Infections of the skin and subcutaneous tissue

Billable codes under L05

L05 is a header code and cannot be used on claims. Choose the most specific code:

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

Block L00-L08

Excludes2 (not included here):
  • 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.-)
Use additional code:
  • code (B95-B97) to identify infectious agent.

Frequently asked questions

What is ICD-10 code L05?

L05 is the ICD-10-CM code for pilonidal cyst and sinus, in the block L00-L08 (Infections of the skin and subcutaneous tissue).

Is L05 a billable code?

No. L05 is a header code with more specific child codes; report one of the billable codes listed above.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.