He is rated 5.0 out of 5 by 1 patient and has one review. He graduated from Indiana University School of Medicine in 2002. Dr. Hammerstein is affiliated with Northern Rockies Orthopaedics PLLP in Missoula, as well as Community Medical Center in Missoula. Dr. Hammerstein received $474 in payments from medical companies between 2014 and 2016, which is more than 29% of Orthopedic Surgeons and 59% of providers nationally.