Obamacare's biggest problem isn't the troubled HealthCare.gov website anymore. Consumers are easing up on criticism of government exchanges and turning their frustration and fury toward some of the nation's biggest health insurers. All too often, new policyholders say, the companies can't confirm coverage, won't answer basic questions, and haven't issued identification numbers needed to fill prescriptions or get medical care. Day after day, people say, they contact insurance company call centers waiting hours at a time with no response. Meantime, insurers have already taken many customers' payments for coverage intended to take effect Jan. 1. But without proof of insurance,...
