If you have recently received medical services and noticed the U4U BCBS prefix on your insurance card or bill, you may be wondering what it means. The u4u bcbs prefix is used by Blue Cross Blue Shield to identify certain employer group plans. This prefix is often followed by a series of numbers that further identify the specific plan. If you have any questions about your insurance coverage or the U4U BCBS prefix, it is recommended that you reach out to your insurance provider directly for clarification. Understanding the details of your insurance plan can help you make informed decisions about your healthcare needs.