People will be able to sign up for 2025 coverage between Oct. 15 and Dec. 7. Thinner benefits and coverage changes await many older Americans shopping for health insurance this fall. That’s if their plan is even still available in 2025.More than a million people will probably have to find new coverage as major insurers cut costs and pull back from markets for Medicare Advantage plans, the privately run version of the federal government’s coverage program mostly for people ages 65 and older.Industry experts also predict some price increases for Medicare prescription drug plans as required coverage improvements kick in.Voters will learn about the insurance changes just weeks before they pick the next president and as Democrat Kamala Harris campaigns on promises to lower health care costs.