born 1950 in Grand Rapids, Michigan. He studied at the University of Michigan, where his interest in the new system of homeopathy was sparked when he discovered the homeopathic library.
In 1976 he began his studies at the National College of Naturopathic Medicine (NCNM). His teachers included Ravi Sahni and John Bastyr.
He directed the homeopathy program at the NCNM from 1980 to 1984.
He taught at Bastyr University and is director of the Hahnemann Academy of North America. In 1993, he published the first edition of the “Homeopathic Medical Repertory“, and in 1996 the “Lotus Materia Medica.“ Both these works are bestsellers in the USA and are now available in the 3rd edition.