DxCodebookFY2027 · Oct 1, 2026 – Sep 30, 2027

Category · FY2027

L05 Pilonidal cyst and sinus

  • Header · not billable

L05 is not billable. The category heads 4 billable codes in FY2027, grouped under 2 subdivisions.

Index → code

  • Sinuspilonidal (infected) (rectum) → L05.92
  • Cyst (colloid) (mucous) (simple) (retention)pilonidal (infected) (rectum) → L05.91
  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)pilonidal → L05.01

Where it sits

  1. Chapter 12 Diseases of the skin and subcutaneous tissue (L00-L99)
  2. L00-L08 Infections of the skin and subcutaneous tissue (L00-L08)
  3. L05 Pilonidal cyst and sinus
Billable codes
4
Subdivisions
2
CC / MCC codes
2 / 0
HCC V28 codes
0
New FY2027
0
Index entries
5

Codes in L05

  1. L05.0
    Pilonidal cyst and sinus with abscess
    Header
  2. L05.01
    Pilonidal cyst with abscess
    BillableCC
    Inclusion terms 3, Excludes2 2

    Inclusion terms

    • Pilonidal abscess
    • Pilonidal dimple with abscess
    • Postanal dimple with abscess

    Excludes2

    • congenital sacral dimple (Q82.6) Q82.6
    • parasacral dimple (Q82.6) Q82.6
  3. L05.02
    Pilonidal sinus with abscess
    BillableCC
    Inclusion terms 3

    Inclusion terms

    • Coccygeal fistula with abscess
    • Coccygeal sinus with abscess
    • Pilonidal fistula with abscess
  4. L05.9
    Pilonidal cyst and sinus without abscess
    Header
  5. L05.91
    Pilonidal cyst without abscess
    Billable
    Inclusion terms 3, Excludes2 2

    Inclusion terms

    • Pilonidal dimple
    • Postanal dimple
    • Pilonidal cyst NOS

    Excludes2

    • congenital sacral dimple (Q82.6) Q82.6
    • parasacral dimple (Q82.6) Q82.6
  6. L05.92
    Pilonidal sinus without abscess
    Billable
    Inclusion terms 3

    Inclusion terms

    • Coccygeal fistula
    • Coccygeal sinus without abscess
    • Pilonidal fistula

CC/MCC: as a secondary diagnosis, unless the principal diagnosis is on the code’s PDX exclusion list (MS-DRG v44 Appendix C; list on the code card).

Sources of each column.

Instructions

Notes that also apply

Block L00-L08 instructions (Excludes2 13, Use additional code 1): printed on the block page.

Chapter 12 instructions (Excludes2 10): printed on the chapter 12 page.

Index entries

  • Abscess (connective tissue) (embolic) (fistulous) (infective) (metastatic) (multiple) (pernicious) (pyogenic) (septic)pilonidal → L05.01
  • Cyst (colloid) (mucous) (simple) (retention)pilonidal (infected) (rectum) → L05.91
  • Sinuspilonidal (infected) (rectum) → L05.92
  • Cyst (colloid) (mucous) (simple) (retention)pilonidal (infected) (rectum)with abscess → L05.01
  • Sinuspilonidal (infected) (rectum)with abscess → L05.02

NCHS Alphabetic Index. Index first, then the Tabular List.

Hierarchy