He graduated with honors from the University of Washington School of Medicine and was named to Alpha Omega Alpha (medical school honor society). He is a clinical professor at the University of New Mexico School of Medicine. He has served three terms as chief-of-staff at Los Alamos Medical Center.

He and his wife, Marian, raised their five children in Los Alamos.

Dr. Honsinger is a Fellow of the American Academy of Allergy, Asthma and Immunology, Fellow of the American College of Allergy and Immunology, and is a master of the American College of Physicians. Dr. Honsinger was listed in the Best Doctors in America in 1996-97 and 1999-2000. He is listed in both the Internal Medicine and Allergy/Immunology sections. He received the Distinguished Laureate Award from the New Mexico Chapter of the American College of Physicians in 1997.

Dr. Honsinger has been active in medical research. He has been a frequent lecturer, both abroad and in the United States. He currently serves on the Board of Directors of the American Academy of Allergy, Asthma and Immunology. He has served on the board of governors of the American College of Physicians. He is chairperson of the UNM-LA Advisory Board.

Dr. Honsinger is available for consultation. He is not accepting new patients for primary care.