Dermatopathology is the subspecialty of dermatology and pathology that is concerned with the study and diagnosis of diseases of the skin and adjacent mucous membranes, cutaneous appendages, hair, nails and subcutaneous tissues by histological, histochemical, immunological, ultrastructural, molecular, and microbiological techniques.

A dermatopathologist is a highly trained physician who specializes in diagnosing disorders of the skin under a microscope. The subspecialty of dermatopathology is a combination of both dermatology (the diagnosis and treatment of skin, hair and nail diseases) and pathology (identification of diseases microscopically). Graduate medical education programs in dermatopathology provide organized education in all current aspects of dermatopathology, including basic science, laboratory procedures, laboratory management, and quality assurance.