Psoriasis vulgaris

This code identifies the most common form of psoriasis, a chronic, immune-mediated inflammatory skin condition characterized by well-demarcated, erythematous plaques covered with silvery scales. These lesions typically appear on the extensor surfaces of the elbows and knees, scalp, and lumbosacral area, and can be associated with itching and discomfort.

Use this code when documentation clearly specifies a diagnosis of psoriasis vulgaris, also known as plaque psoriasis. This diagnosis is typically made clinically based on the characteristic appearance of the skin lesions. Supporting documentation would include physician notes detailing the morphology and distribution of psoriatic plaques.

• Do not use this code for other forms of psoriasis (e.g., guttate, inverse, pustular, erythrodermic); specific codes exist for these variants.
• If psoriatic arthritis is also present, code the arthritis first, followed by this code for the skin manifestation.
• Ensure the documentation specifies "vulgaris" or "plaque type" to differentiate from unspecified psoriasis.