DermatologistOnCall (previously Iagnosis) is a company providing a network of online dermatologists. Its platform helps physician practices and health systems integrating online visits into their operations. The conditions commonly treated by dermatologists are acne, actinic keratosis, athlete's foot, carcinoma, chronic hives (urticaria), cold sores eczema (atopic dermatitis), hair loss, hyperhidrosis, keratosis, melanoma, melasma, poison ivy, seborrheic dermatitis, and others.