Dr. Larsen spent the early years of his life on his family's dairy farm in Preston, Idaho, graduating from Preston High School. After serving an LDS mission to South Africa, he received a Bachelors Degree from Utah State University, majoring in English. Dr. Larsen graduated from the University of the Pacific School of Dentistry in San Francisco, California in 1978. The next three years took him to Ft. Leonard Wood, Missouri where he served as a captain in the Army Dental Corps. Dr. Larsen started his private dental practice in Provo, Utah in 1981. Since that time his appreciation for dentistry has grown as he has served as the president of the Provo District Dental Society in 1996 and also the Utah Dental Association in 2002. He currently serves on the Utah State Dentist/Dental Hygienist Licensing Board and also as an examiner for the Western Regional Examining Board.

Dr. Larsen is the father of three children. His oldest son, Christian, lives in Orange County, California with his wife, Ashley and their two daughters, Ava and Shea. Dr. Larsen's second oldest son, Kelly, lives in Provo with his wife, Whitney, and their two sons, Gunnar and Jett. His daughter, Maren, lives in Provo with her husband and their son, Will.

Some of Dr. Larsen's interests are boating, raising horses, and riding motorcycles.