What does "transfer balance" mean?

If the term "transfer balance" appears on your statement or patient responsibility notice, this means that after your insurance processed the claim, a remaining balance was transferred back to you.  This sometime occurs because you still owe a co-insurance or deductible amount.  It could also be a non-covered benefit.  The explanation of benefits ("EOB") that you receive from your insurance comany should provide additional details regarding the processing of your claim.