L51.9

Erythema multiforme, unspecified

Billable / specific

L51.9 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Not coded here — never report together with this code.

Not included here — may be reported together when both conditions exist.

certain conditions originating in the perinatal period (P04-P96) (from L51)
certain infectious and parasitic diseases (A00-B99) (from L51)
complications of pregnancy, childbirth and the puerperium (O00-O9A) (from L51)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99) (from L51)
endocrine, nutritional and metabolic diseases (E00-E88) (from L51)
lipomelanotic reticulosis (I89.8) (from L51)
neoplasms (C00-D49) (from L51)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94) (from L51)
systemic connective tissue disorders (M30-M36) (from L51)
viral warts (B07.-) (from L51)

Add a code to identify the following, if applicable.

code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5) (from L51)
code to identify associated manifestations, such as: (from L51)
arthropathy associated with dermatological disorders (M14.8-) (from L51)
conjunctival edema (H11.42) (from L51)
conjunctivitis (H10.22-) (from L51)
corneal scars and opacities (H17.-) (from L51)
corneal ulcer (H16.0-) (from L51)
edema of eyelid (H02.84-) (from L51)
inflammation of eyelid (H01.8-) (from L51)
keratoconjunctivitis sicca (H16.22-) (from L51)
mechanical lagophthalmos (H02.22-) (from L51)
stomatitis (K12.-) (from L51)
symblepharon (H11.23-) (from L51)
code to identify percentage of skin exfoliation (L49.-) (from L51)

L51.0Nonbullous erythema multiformeBillable
L51.1Stevens-Johnson syndromeBillable
L51.2Toxic epidermal necrolysis [Lyell]Billable
L51.3Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndromeBillable
L51.8Other erythema multiformeBillable