2027 ICD-10-CM Diagnosis Code L23Allergic contact dermatitis
L23 is a non-billable ICD-10-CM category code for allergic contact dermatitis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as L23.0, L23.1, L23.2, and L23.3.
Code Identity
Code Classification
Specific Coding for Allergic contact dermatitisOverview
Non-specific codes like L23 require more characters. Use one of these billable codes instead:
Use L23.0 for Allergic contact dermatitis due to metals
Use L23.1 for Allergic contact dermatitis due to adhesives
Use L23.2 for Allergic contact dermatitis due to cosmetics
Use L23.3 for Allergic contact dermatitis due to drugs in contact with skin
Use L23.4 for Allergic contact dermatitis due to dyes
Use L23.5 for Allergic contact dermatitis due to other chemical products
Use L23.6 for Allergic contact dermatitis due to food in contact with the skin
Use L23.7 for Allergic contact dermatitis due to plants, except food
L23.8 for Allergic contact dermatitis due to other agents
Use L23.81 for Allergic contact dermatitis due to animal (cat) (dog) dander
Use L23.89 for Allergic contact dermatitis due to other agents
Use L23.9 for Allergic contact dermatitis, unspecified cause
Instructional NotesGuidance
Instructions from the official ICD-10-CM Tabular List that apply to L23: its own notes plus those printed at block L20-L30 and Chapter 12. A note printed at a category, block or chapter applies to every code under it.
Excludes1
Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.
Excludes2
Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.
- 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
General instructions on how these codes are used.
- In this block the terms dermatitis and eczema are used synonymously and interchangeably.
Source: CMS ICD-10-CM Tabular List. How to read instructional notes.
Referenced in Other NotesGuidance
Instructional notes printed at other codes that name L23, its category, or a range that includes it.
Excludes1 4
These codes carry an Excludes1 note naming L23: they are not reported together with it, unless the two conditions are unrelated.
Excludes2 3
These codes carry an Excludes2 note naming L23: its condition is not part of those codes, and both may be reported when the patient has both.
Code First 2
These codes say to code first a condition named in the note, and L23 is one of the conditions named.
- F54 Psychological and behavioral factors associated with disorders or diseases classified elsewhere
- Block T36-T50 Poisoning by, adverse effect of and underdosing of drugs, medicaments and biological substances
Clinical InformationClinical
Dermatitis, Allergic Contact
a contact dermatitis due to allergic sensitization to various substances. these substances subsequently produce inflammatory reactions in the skin of those who have acquired hypersensitivity to them as a result of prior exposure.
Patient EducationClinical
Allergy
An allergy is a reaction by your immune system to something that does not bother most other people. People who have allergies often are sensitive to more than one thing. Substances that often cause reactions are:
Read the full article at MedlinePlus
Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.
Code HistoryHistory
Questions About L23Overview
What is the ICD-10 code for allergic contact dermatitis?
L23 is the ICD-10-CM category for allergic contact dermatitis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.
Is L23 (Allergic contact dermatitis) a billable code?
No. This is a category header that groups the codes for allergic contact dermatitis, and headers cannot be submitted on claims. Claims for allergic contact dermatitis need a more specific code from this category, such as L23.0, L23.1, and L23.2.
Can L23 be reported with T78.40?
Not as a rule. The Excludes1 note on L23 lists "allergy NOS (T78.40)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).
