Home › Top 4 Dermatologist in Portsmouth, New Hampshire Find best Dermatologist in Portsmouth, New Hampshire, with all necessary contact information, including addresses, phone numbers, working hours, map locations, and website links. Dr. Molly B. Chartier, MD US, Portsmouth, NH 03801155 Borthwick Ave Adult & Pediatric Dermatology, PC - Portsmouth (NH 03801) US, Portsmouth, NH 0380175 Portsmouth Blvd Suite 310 Dr. Margaret I. Stewart, MD US, Portsmouth, NH 03801155 Borthwick Ave Seacoast Dermatology, PLLC - Portsmouth US, Portsmouth, NH 03801330 Borthwick Ave STE 303