Kristy Fassler, ND - Proactive Healing PLLC is a naturopathic medicine practice in Portsmouth, New Hampshire. Kristy Fassler, ND treats a wide range of conditions, including Lyme disease, chronic fatigue, and osteoporosis. The practice emphasizes identifying the source of symptoms through a comprehensive health history, appropriate lab testing, and physical examination, then developing a personalized treatment plan. Appointments are available in office, by phone, and via telehealth.