He is rated 4.5 stars out of 5 by his patients. He is affiliated with Lowell General Hospital. Dr. Sigman is in-network for Fallon Community Health Plan (FCHP), Neighborhood Health Plan, and Aetna, in addition to other insurance carriers. His practice is open to new patients. He graduated from the University of Maryland School of Medicine. Dr. Sigman trained at Tufts Medical Center for his residency. He has received professional recognition including the following: Alpha Omega Alpha Medical Honor Society.