2026 ICD-10-CM Diagnosis Code L27Dermatitis due to substances taken internally
L27 is a non-billable ICD-10-CM category code for dermatitis due to substances taken internally, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L27.0, L27.1, L27.2, and L27.8.
Code Identity
Code Classification
Specific Coding for Dermatitis due to substances taken internallyOverview
Non-specific codes like L27 require more characters. Use one of these billable codes instead:
Use L27.0 for Generalized skin eruption due to drugs and medicaments taken internally
Use L27.1 for Localized skin eruption due to drugs and medicaments taken internally
Use L27.2 for Dermatitis due to ingested food
Use L27.8 for Dermatitis due to other substances taken internally
Use L27.9 for Dermatitis due to unspecified substance taken internally
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Type 1 Excludes
- allergy NOS T78.40
Type 2 Excludes
- adverse food reaction, except dermatitis T78.0 T78.1
- contact dermatitis L23 L25
- drug photoallergic response L56.1
- drug phototoxic response L56.0
- urticaria L50
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Patient EducationClinical
Rashes
A rash is an area of irritated or swollen skin. Many rashes are itchy, red, painful, and irritated. Some rashes can also lead to blisters or patches of raw skin. Rashes are a symptom of many different medical problems. Other causes include irritating substances and allergies. Certain genes can make people more likely to get rashes.
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About L27Overview
Is L27 (Dermatitis due to substances taken internally) a billable code?
No. This is a category header that groups the codes for dermatitis due to substances taken internally, and headers cannot be submitted on claims. Claims for dermatitis due to substances taken internally need a more specific code from this category, such as L27.0, L27.1, and L27.2.
