L52 Erythema nodosum

Billable

Block: Urticaria and erythema (L49-L54)

Excludes 1 (cannot be coded together)

  • tuberculous erythema nodosum (A18.4)
This category is a complete, billable diagnosis code.

No additional specificity is required — submit L52 directly on claims and documentation without a subcode extension.

Last reviewed: September 2026