If you have an attorney let he or she do their job and notify them of this matter.  If he agrees to maintain the coverage and did not in lieu of spousal support then he breached the agreement and you are going to have to go after him to make it right.  You are going to have to find out how much the bills amount to for reimbursement to the insurance company.  I a sure that they sent EOB's (explanation of benefit letters) to your husband's address.  Since the health information was regarding you ask them to fax you copies of the forms.  It should not be a HIPAA problem.  Once you have all the information you are going to have to determine how you want to proceed. And now you need to modify the agreement for spousal support.  Good luck.