Coding and coverage · ICD-10-CM

L51 Erythema multiforme

Not billable (header)Chapter 12

Report one of the more specific codes below.

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Codes under this one

  • L51.0 Nonbullous erythema multiforme
  • L51.1 Stevens-Johnson syndrome
  • L51.2 Toxic epidermal necrolysis [Lyell]
  • L51.3 Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndrome
  • L51.8 Other erythema multiforme
  • L51.9 Erythema multiforme, unspecified

Instructional notes

Chapter 12

Excludes2Not included here: the patient may have both; report both when both are present.
  • 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.-)

Section L49-L54

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.

This code

Excludes1Not coded here: never report with this code, except when the two conditions are unrelated.
  • staphylococcal scalded skin syndrome (L00)
  • Ritter's disease (L00)
Use additional codeAdd a second code for the full picture.
  • 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.-)

Chapter 12: Diseases of the skin and subcutaneous tissue · L49-L54 Urticaria and erythema (L49-L54)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.