weblinks.us/holistic-medicine-dentistry (202) 237-7000 National Integrated Health Associates - Washington DC- Reviews Excellent Rating I've been here for medical visits, dental visits and dental cleanings and I've never felt so comfortable with a medical or dental clinic before. Their layout and billing procedures have changed (for the better) in the past 2 years I've been going there and I've only had positive interactions with staff. The doctors they have working there are also top-notch and I'd be hard-pressed to find another clinic with doctors who genuinely care and where I get such great service. National Integrated Health Associates 5225 Wisconsin Ave NW, Suite 402 Washington DC 20015 Holistic Medicine Washington DC 4. Leaders in Holistic Integrative Medicine and Biological Dentistry. National Integrated Health Associates (NIHA) are leaders in holistic integrative medicine and biological dentistry. NIHA has been serving the Washington DC, Maryland, and Northern Virginia metropolitan area since 1995. Integrative doctors blend the best of western medicine and safe, proven complementary and alternative therapies to help heal the body. The professional health team is comprised of holistic medical physicians, biological dentists, naturopaths, a chiropractor, and health professionals hightly skilled in acupuncture, nutrition, and other healing therapies.