You can request an assignment order under A.R.S. § 25-323 and § 12-2454. An Income Withholding for Support is available on the Superior Court website to be filled out and filed with the Court. This will require your former spouse’s employer or other payor to withhold the amount from his or her wages or money owed to you and to send that amount directly to the AZ clearinghouse.
You may also want to file a Petition to Enforce Child Support, Child Support Arrears and Medical Expense Reimbursement. All three of these issues should go in the one Petition because you want the Court to enforce the current order in effect, have the Court enforce the amounts not paid by your former spouse, along with any medical expenses. Ask for attorney’s fees in the Petition if you choose to hire one for this Petition.