Diseases of the skin and subcutaneous tissue (L00-L99)

Excludes 2:
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.-)

Urticaria and erythema (L49-L54)

Excludes 1:
Lyme disease (A69.2-)
rosacea (L71.-)
L49 Exfoliation due to erythematous conditions according to extent of body surface involved [+]
Code first erythematous condition causing exfoliation, such as:
Ritter's disease (L00)
(Staphylococcal) scalded skin syndrome (L00)
Stevens-Johnson syndrome (L51.1)
Stevens-Johnson syndrome-toxic epidermal necrolysis overlap syndrome (L51.3)
Toxic epidermal necrolysis (L51.2)
L50 Urticaria [+]
Excludes 1: allergic contact dermatitis (L23.-)
angioneurotic edema (T78.3)
giant urticaria (T78.3)
hereditary angio-edema (D84.1)
Quincke's edema (T78.3)
serum urticaria (T80.6-)
solar urticaria (L56.3)
urticaria neonatorum (P83.8)
urticaria papulosa (L28.2)
urticaria pigmentosa (D47.01)
L51 Erythema multiforme [+]
Use additional code for adverse effect, if applicable, to identify drug (T36-T50 with fifth or sixth character 5)
Use additional code to identify associated manifestations, such as:
Use additional arthropathy associated with dermatological disorders (M14.8-)
Use additional conjunctival edema (H11.42)
Use additional conjunctivitis (H10.22-)
Use additional corneal scars and opacities (H17.-)
Use additional corneal ulcer (H16.0-)
Use additional edema of eyelid (H02.84-)
Use additional inflammation of eyelid (H01.8)
Use additional keratoconjunctivitis sicca (H16.22-)
Use additional mechanical lagophthalmos (H02.22-)
Use additional stomatitis (K12.-)
Use additional symblepharon (H11.23-)
Use additional code to identify percentage of skin exfoliation (L49.-)
Excludes 1: staphylococcal scalded skin syndrome (L00)
Ritter's disease (L00)
L52 Erythema nodosum
Excludes 1: tuberculous erythema nodosum (A18.4)
L53 Other erythematous conditions [+]
Excludes 1: erythema ab igne (L59.0)
erythema due to external agents in contact with skin (L23-L25)
erythema intertrigo (L30.4)
L54 Erythema in diseases classified elsewhere
Code first underlying disease.

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