Certifications: Knee – January 2017 Bio: Dr. John Gehnrich is a gifted and compassionate chiropractor who has been serving patients living in Nassau County and Long Island, New York, from his practice, Rhino Chiropractic & Wellness in Rockville Center. His patients benefit from a wide range of holistic and chiropractic services to address neck pain, back pain, sciatica, headaches
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