Alphabetic Index FY2027

L23

Allergic contact dermatitis

FY2027Chapter 12: Diseases of the skin and subcutaneous tissue/L20–L30 Dermatitis and eczema

Non-billable headerNot valid on its own. Use one of the more specific codes under it.

L23 is a non-billable ICD-10-CM code category for allergic contact dermatitis. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are L23.0 Allergic contact dermatitis due to metals, L23.1 Allergic contact dermatitis due to adhesives, L23.2 Allergic contact dermatitis due to cosmetics, L23.3 Allergic contact dermatitis due to drugs in contact with skin and 6 more. Its coding notes include 3 Excludes1 entries and 25 Excludes2 entries.

Excludes1

Not coded here. The listed conditions generally should not be reported together.

This code

Excludes2

Not included here. Both codes may be reported if the patient has both conditions.

This code
  • dermatitis due to substances taken internally (L27.-)
  • dermatitis of eyelid (H01.1-)
  • diaper dermatitis (L22)
  • eczema of external ear (H60.5-)
  • irritant contact dermatitis (L24.-)
  • perioral dermatitis (L71.0)
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
Also from chapter/block level (18 notes)
Inherited from L20–L30 Dermatitis and eczema
  • chronic (childhood) granulomatous disease (D71-)
  • dermatitis gangrenosa (L08.0)
  • dermatitis herpetiformis (L13.0)
  • dry skin dermatitis (L85.3)
  • factitial dermatitis (L98.1)
  • perioral dermatitis (L71.0)
  • radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
  • stasis dermatitis (I87.2)
Inherited from Chapter 12 Diseases of the skin and subcutaneous tissue
  • 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.-)

Notes

Also from chapter/block level (1 note)
Inherited from L20–L30 Dermatitis and eczema
  • In this block the terms dermatitis and eczema are used synonymously and interchangeably.

More specific codes under L23 10