L51

ICD-10Non-billable category

Erythema multiforme

Official ICD-10-CM descriptor (FY2026)

Erythema multiforme

L51 is a category heading, not a billable code. CMS does not accept it on a claim; report one of the more specific codes beneath it.

Excludes1

Not coded here. An Excludes1 code should never be reported at the same time as the code above it.

staphylococcal scalded skin syndrome (L00)
Ritter's disease (L00)

Use additional code

Report an additional code to identify the associated condition.

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
code to identify associated manifestations, such as:
arthropathy associated with dermatological disorders (M14.8-)
conjunctival edema (H11.42)
conjunctivitis (H10.22-)
corneal scars and opacities (H17.-)
corneal ulcer (H16.0-)
edema of eyelid (H02.84-)
inflammation of eyelid (H01.8-)
keratoconjunctivitis sicca (H16.22-)
mechanical lagophthalmos (H02.22-)
stomatitis (K12.-)
symblepharon (H11.23-)
code to identify percentage of skin exfoliation (L49.-)

More specific codes under L51

Where this code sits

Chapter: 12. Diseases of the skin and subcutaneous tissue (L00-L99)
Block: Urticaria and erythema (L49-L54)

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Source

ICD-10-CM FY2026. Centers for Medicare & Medicaid Services (CMS) / National Center for Health Statistics (NCHS), “2026 ICD-10-CM Code Descriptions in Tabular Order” (icd10cm_order_2026.txt). Download the original file from cms.gov. Public domain (US Government work). Descriptors, billable flags and instructional notes on this page are reproduced from that file without modification. Krasyn adds no clinical guidance.