L23 ICD-10-CA category: Allergic contact dermatitis
L23 isn’t a code on its own. Choose one of the 10 codes beneath it, the one the documentation supports.
Official description
L23Allergic contact dermatitis
ICD-10-CA · Canada
Codes in L23
L23 isn’t a code on its own. Open the code that matches what the note documents.
L23.0Allergic contact dermatitis due to metalsL23.1Allergic contact dermatitis due to adhesivesL23.2Allergic contact dermatitis due to cosmeticsL23.3Allergic contact dermatitis due to drugs in contact with skinL23.4Allergic contact dermatitis due to dyesL23.5Allergic contact dermatitis due to other chemical productsL23.6Allergic contact dermatitis due to food in contact with skinL23.7Allergic contact dermatitis due to plants, except foodL23.8Allergic contact dermatitis due to other agentsL23.9Allergic contact dermatitis, unspecified causeNotes for L23
As CIHI prints them, with any note L23 takes from the headings above it.
Includes
- Allergic contact eczema
Excludes
Conditions classified elsewhere.
- Allergy NOS (T78.4)dermatitis (of):• NOS (L30.9)• contact NOS (L25.9)• diaper [napkin] (L22)• due to substances taken internally (L27.-)• eyelid (H01.1)• irritant contact (L24.-)• perioral (L71.0)eczema of external ear (H60.5)radiation-related disorders of the skin and subcutaneous tissue (L55-L59)
- Chronic (childhood) granulomatous disease (D71)dermatitis:• dry skin (L85.3)• factitial (L98.1)• gangrenosa (L08.0)• herpetiformis (L13.0)• perioral (L71.0)• stasis (I83.1-I83.2)radiation-related disorders of the skin and subcutaneous tissue (L55-L59)From L20-L30 Dermatitis and eczema
- Certain:• conditions originating in the perinatal period (P00-P96)• infectious and parasitic diseases (A00-B99)complications of pregnancy, childbirth and the puerperium (O00-O99)congenital malformations, deformations and chromosomal abnormalities (Q00-Q99)endocrine, nutritional and metabolic diseases (E00-E90)injury, poisoning and certain other consequences of external causes (S00-T98)lipomelanotic reticulosis (I89.8)neoplasms (C00-D48)symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R99)systemic connective tissue disorders (M30-M36)From Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
Note
- In this block the terms dermatitis and eczema are used synonymously and interchangeably.From L20-L30 Dermatitis and eczema
Where L23 sits
- 1ChapterChapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
- 2Block L20-L30Dermatitis and eczema
- 3Category L23Allergic contact dermatitis
Source and release
- Data release
- ICD-10-CA · FY 2026–2027
- Effective date
- Apr 1, 2026
- Publisher
- CIHI
This page is built from the ICD-10-CA catalog that Vero Codes reads when it suggests codes: Canadian Institute for Health Information’s FY 2026–2027 release, imported from the publisher’s file and checked against it. The description, notes and structured data come from the same record.
Frequently asked questions
Is L23 a valid ICD-10-CA code?
No. L23 (Allergic contact dermatitis) is a category heading in CIHI’s ICD-10-CA FY 2026–2027 release. It holds 10 codes; record the one the documentation supports.
Where is L23 in ICD-10-CA?
L23 sits under L20-L30 Dermatitis and eczema, within Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99).
What coding notes apply to L23?
ICD-10-CA lists Includes, Excludes, Note notes for L23, including those from the headings it sits under. They are listed on this page with where each one comes from.
Which ICD-10-CA release does this page use?
It uses CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026 to Mar 31, 2027. It is a reference: confirm the code against the current list and the payer’s rules before you submit it.