What's a rider (ryder)???
A rider is a contract that is attached as an amendment of sorts to another contract. For example, if an employer purchases a basic insurance package that excludes WLS, the employer can opt to purchase a "rider" that will override the exclusion and cover the procedure. A rider can be as expensive as the actual basic coverage depending on what exclusions it is overriding. A rider is also across-the-board, meaning individuals can't purchase a rider for their particular policy through their employer, the employer must purchase the rider for all of its insureds or none at all.
Riders are used a lot in the entertainment and sports world on their contracts as well.
If your insurance covers WLS, you don't need a rider and can get approved without one.