He has a single doctor practice that produces $3.4 million a year without comprehensive crown and bridge, oral surgery, dentures, implant surgery, TMJ, sleep apnea, and sedation dentistry. Dr. Opp went from $500,000 in debt in 2010 to recreating lifetime savings and ready to retire in four years using the strategies in the chapter he contributed to a new book with noted business development expert, best-selling author and speaker, Brian Tracy, titled Transform. The book is due in September 2014.