L51.9Billable

Erythema multiforme, unspecified

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

Related codes in category L51

L51Erythema multiformeL51.0Nonbullous erythema multiformeYesL51.1Stevens-Johnson syndromeYesL51.2Toxic epidermal necrolysis [Lyell]YesL51.3Stevens-Johnson synd-tox epdrml necrolysis overlap syndromeYesL51.8Other erythema multiformeYes

Frequently asked questions

What is ICD-10 code L51.9?

L51.9 is an ICD-10-CM diagnosis code for Erythema multiforme, unspecified.

Is L51.9 a billable code?

Yes. L51.9 is billable and specific enough to be used on a claim.

What ICD-10-CM chapter is L51.9 in?

L51.9 falls under Chapter 12: Diseases of the skin and subcutaneous tissue.

When did L51.9 become effective?

L51.9 has been effective since October 1, 2026, per the CMS/CDC ICD-10-CM annual release.

What other codes are related to L51.9?

L51.9 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.