Pityriasis lichenoides chronica

This code represents Pityriasis Lichenoides Chronica (PLC), a rare, chronic inflammatory skin condition characterized by recurrent crops of small, reddish-brown papules that may develop a fine scale and often resolve with post-inflammatory hyperpigmentation or hypopigmentation. It is a milder, more persistent form of pityriasis lichenoides, distinct from its acute counterpart, Pityriasis Lichenoides et Varioliformis Acuta (PLEVA).

Use this code when documentation clearly indicates a diagnosis of Pityriasis Lichenoides Chronica, often following a biopsy confirming the characteristic histopathological features. This diagnosis is typically made by a dermatologist based on clinical presentation and histopathology, distinguishing it from other papulosquamous disorders.

• Differentiate carefully from Pityriasis Lichenoides et Varioliformis Acuta (PLEVA), which has a separate and distinct code.
• Ensure the provider's documentation specifies "chronica" to support the use of this particular code.
• Consider sequencing this code as a primary diagnosis if it is the reason for the encounter, or as a secondary diagnosis if it is a co-existing condition being managed.