Pityriasis rosea

This code identifies a common, self-limiting inflammatory skin condition characterized by a distinctive rash. The rash typically begins with a single, larger "herald patch" followed by smaller, oval-shaped lesions that often appear in a "Christmas tree" pattern on the trunk and proximal extremities.

Apply this code when documentation confirms a diagnosis of pityriasis rosea, based on the characteristic clinical presentation. This diagnosis is typically made clinically, without the need for biopsy or extensive laboratory testing.

• Ensure the documentation clearly distinguishes pityriasis rosea from other papulosquamous disorders like tinea corporis or secondary syphilis.
• This code is typically a primary diagnosis as it represents a distinct dermatological condition.
• No specific laterality or severity modifiers are applicable for this condition.