L27.9 ICD-10-CA code: Dermatitis due to unspecified substance taken internally
L27.9 is the ICD-10-CA code for “Dermatitis due to unspecified substance taken internally” in CIHI’s FY 2026–2027 release, in effect from Apr 1, 2026.
Official description
L27.9Dermatitis due to unspecified substance taken internally
Short description: Dermat dt unspec subs taken internally
ICD-10-CA · Canada · Also written L279
Index terms
Entries in CIHI’s alphabetical index that lead to L27.9. Searching the index by the condition the note names is how coders reach this code.
- Dermatitis, due to, internal agent
- Dermatitis, due to, ingestion, ingested substance
Notes for L27.9
As CIHI prints them, with any note L27.9 takes from the headings above it.
Excludes
Conditions classified elsewhere.
- Adverse:• effect NOS of drugs (T88.7)• food reaction, except dermatitis (T78.0-T78.1)allergy NOS (T78.4)contact dermatitis (L23-L25)drug:• photoallergic response (L56.1)• phototoxic response (L56.0)urticaria (L50.-)From L27 Dermatitis due to substances taken internally
- 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 L27.9 sits
- 1ChapterChapter 12: Diseases of the skin and subcutaneous tissue (L00-L99)
- 2Block L20-L30Dermatitis and eczema
- 3Category L27Dermatitis due to substances taken internally
- 4Valid code L27.9Dermatitis due to unspecified substance taken internally
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
What does ICD-10-CA code L27.9 mean?
L27.9 is the ICD-10-CA code for “Dermatitis due to unspecified substance taken internally” in CIHI’s ICD-10-CA FY 2026–2027 release.
Where is L27.9 in ICD-10-CA?
L27.9 sits under L27 Dermatitis due to substances taken internally, within L20-L30 Dermatitis and eczema, within Chapter 12: Diseases of the skin and subcutaneous tissue (L00-L99).
What coding notes apply to L27.9?
ICD-10-CA lists Excludes, Note notes for L27.9, 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.