Without scrutiny, insurers and data brokers are predicting your health costs based on public data about things like race, marital status, your TV consumption and even if you buy plus-size clothing. The companies are tracking your race, education level, TV habits, marital status, net worth. They’re collecting what you post on social media, whether you’re behind on your bills, what you order online. Then they feed this information into complicated computer algorithms that spit out predictions about how much your health care could cost them.
Source: Health Insurers Tap Data Brokers To Help Predict Costs : Shots – Health News : NPR