Health insurance

I am the provider of health insurance and I have primary cusotdy. My ex is demanding a copy of my health insurance card for our son. I do not want to give it to him and I do not want his involvement in the claims. Is this reasonable?

He took him to urgent care and put himself down as the responsible party. He brought me paperwork and I filed it. A new statement from the provider was sent to my ex showing what insurance had not covered and he went crazy and paid the balance. If he would have sent me the statement, I could have checked with my insurance and then paid anything not covered through my company HSA.

What legally can I do if anything about these aggravations?
Nothing is mentioned in our orders?

I do think you should turn over an insurance card to your ex, and explain to him the process of how claims should be handled in the future.