Dr. King pioneered the use of Janus kinase (JAK) inhibitors in cutaneous diseases, in particular for alopecia areata, vitiligo, atopic dermatitis, granuloma annulare, sarcoidosis, and erosive lichen planus. He is associate professor of Dermatology and Pediatric Dermatology at Yale University School of Medicine, and sees patients at his practice at Yale Dermatology – Middlebury.