I recently went over all the claims that have an insurance credit owed to them. Some of these credits date years back! It seems very overwhelming. As a new policy, if a biller sees that an insurance over paid we call them within that next week. Can we send the claims in as void to have the insurance re-coop their money? This seems to happen a lot and I am not sure why. I will send a claim to a primary insurance company leaving the balance at $20. When I send the copay to the secondary they pay the whole thing. I always send over the COB as well.