L23.9

Billable code

Allergic contact dermatitis, unspecified cause

The ICD-10 code for allergic contact dermatitis, unspecified cause is L23.9.

Clinical notes

Also known as

Alternate wording, synonyms, or specific conditions that fall under this code, listed to help confirm you've picked the right one.

Allergic contact eczema NOS

Documentation support

General coding-documentation guidance — not a substitute for payer-specific requirements or professional coding judgment.

•This code describes an unspecified presentation. If the medical record documents a more specific detail (e.g. laterality, type, or affected site), a more specific sibling code should be used instead — see Related codes below.
•As a general rule, code to the highest level of specificity supported by the documentation in the medical record.

Related codes in this category

ICD-9-CM equivalent

Informational only — GEM mappings are approximate, not guaranteed one-to-one equivalents. Verify before use in billing.

6929Approximate match

View full ICD-10 → ICD-9 crosswalk →

Associated MS-DRGs

L23.9 can serve as the principal diagnosis for these Medicare Severity Diagnosis-Related Groups.

Informational only — actual DRG assignment also depends on procedures, complications/comorbidities (CC/MCC), discharge status, and payer-specific rules not reflected here.