Introduction and how to bill two insurances

I am a high school teacher, I live in California, I am a mother and decided that there are some lovely blogs out there and I want to join. Today I want to talk about how to bill two insurances. It seems like you shouldn't have to do any work if you are fortunate enough to have two. But, I've found out that the steps are as follows:

1. Make a copy of the bill from the provider.
2. Make a copy of the "explanation of benefits" from your insurance company.
3. Write a short "To Whom it May Concern" letter explaining what you are submitting to them, include ID and group numbers. P.S. Also write down the date it is sent, and make a copy of this letter as well.
4. All of these items should be sent together to the secondary insurance carrier, make sure you have the address right.
5. I have found it is a little difficult to check on the "claim," but I've made online accounts with all insurances. I do know that it has worked, because I resubmitted claims and they said they had already been taken care of.

I posted this because I didn't find much information online about how to do this, and when I called insurance companies, they were not very helpful. I hope you find it helpful.

Keywords: billing insurance, insurances, two, secondary... SUCCESS!