Can custodial parent be in contempt for keeping kids out of school 'sick' 5 days but not taking them to a doc or informing me?

Does your parenting plan have joint decision making, specifically joint decision making regarding medical decisions? Many plans also have a provision requiring notification to the other parent of important developments effecting the children. If yes, and you were not consulted to make the decision you may have something unless this was an emergency. However, my best guess is that unless you have very good evidence that the children were not sick, that your complaining that the children were kept out of school due to illness will not be very wise. I'm confused what you're complaint is. What does providing health insurance and being 100% responsible for health care cost payment, have to do with deciding to keep the children out of school? Why did you call CPS? Did you really consider it abuse to keep a sick child out of school? Are you fustrated by the lack of information? Why would the Mother not want to consult with you I wonder? Is there an alternative dispute resolution provision to your plan? If yes, I suggest using that to attempt to add specific language to address what your concern really is. Good luck.