Enrollment in Medicare Advantage plans starts on Oct. 15 and all but one of Connecticut’s Congressional delegation is worried about Anthem’s decision to terminate some doctors from their network. U.S. Sen. Richard Blumenthal, along with U.S. Reps. Rosa DeLauro, John Larson, Joe Courtney, Jim Himes, and Jahana Hayes wrote Anthem Blue Cross and Blue Shield President Jill Hummel and asked for more information about how many providers have been terminated from the network and why these providers were chosen.