L28 ICD-10-CM Code: Lichen simplex chronicus and prurigo

L28 is the ICD-10-CM diagnosis code for lichen simplex chronicus and prurigo. L28 sits in the ICD-10-CM chapter for diseases of the skin and subcutaneous tissue (l00-l99), within the section covering dermatitis and eczema (l20-l30).

Header codes like L28 cannot be reported on claims directly, they organize child codes that share clinical context but the actual diagnosis must be coded to the highest level of specificity supported by the documentation. Coders should look at L28's child codes and select the one that matches the patient's documented presentation, since payers reject header codes submitted as the primary diagnosis. For risk adjustment workflows, header codes never contribute to a Medicare Advantage member's RAF score on their own; only billable child codes that happen to map to a payment HCC affect risk-adjusted plan payments.