Most Massachusetts residents (75 percent) don't know insurers must provide price information for various medical services, according to a poll conducted by consulting and research firm Mass Insight. Another 82 percent said they didn't have information that let them compare cost and quality before receiving a medical service. But they will soon get that information when insurers launch their price comparison websites on Oct. 1. Aetna and UnitedHealthcare already have created websites that allow members to comparison shop for healthcare services, noted The Boston Globe. California, meanwhile, is launching its own healthcare price transparency and quality database, which will rely on claims data from the Centers for Medicare & Medicaid Services and from private payers. Article