L51Header code — not billable

Erythema multiforme

Chapter
12. Diseases of the skin and subcutaneous tissue
Category
L51
Effective date
October 1, 2026

Related codes in category L51

L51.0Nonbullous erythema multiformeYesL51.1Stevens-Johnson syndromeYesL51.2Toxic epidermal necrolysis [Lyell]YesL51.3Stevens-Johnson synd-tox epdrml necrolysis overlap syndromeYesL51.8Other erythema multiformeYesL51.9Erythema multiforme, unspecifiedYes

Frequently asked questions

What is ICD-10 code L51?

L51 is an ICD-10-CM diagnosis code for Erythema multiforme.

Is L51 a billable code?

No. L51 is a category/header code, not billable on its own — use one of its more specific child codes instead.

What ICD-10-CM chapter is L51 in?

L51 falls under Chapter 12: Diseases of the skin and subcutaneous tissue.

When did L51 become effective?

L51 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to L51?

L51 belongs to category L51, which includes 6 other codes — see the related codes list on this page.

ICD-10-CM data maintained by CDC/CMS (public domain). Always verify codes with authoritative sources before making coding or billing decisions.