Health insurance question

Kristen • Momma to my sweet baby boys Tommy Alan 07/01/18 Henry Garnet 10/04/20

Okay so idk if anyone can help me but my husbands job just changed insurance companies. We used to have cigna and now we have blue cross. My son has his 18 month check up tomorrow and I have yet to receive his new insurance cards. I only have mine in an email. Would they be able to use mine with my policy number for my son?

Thank you guys....