Do I need to go back to court to receive the child support credit for providing medical insurance for my children?

In my POS my X is supposed to maintain "reasonably comparable" medical coverage for our 3 children as long as it is offered through his employer, which he has done for the last 4 years without issue. This year he has changed the plan from no coinsurance to 50/50 coinsurance with a $5000 deductible, to lessen the amount taken from his paycheck each week. Is this considered reasonably comparative? I am responsible for for 48% of the medical costs after I pay the first $250 of medical costs per child and submit receipts quarterly to him for reimbursement on what I've laid out. Also in my POS if I can provide "reasonably comparable" medical coverage than I would receive the credit on the child support. His support payments are made through garnishment through probation, if I am able to get them covered can I have the support adjusted through probation or do I need to go back to court? I have primary residential custody, his parenting rights were suspended in 2016.