MedicaidBilling CodesHigh impact
Billing for periodic orthodontic treatment visits CDT® 8670
Washington Apple Health·WA · Dentistry·Coding
We identified it
Jun 20, 2026
Summary
Orthodontic providers billing Washington State Apple Health (Medicaid) for periodic orthodontic treatment visits (CDT D8670) must bill in exact three-month intervals starting after appliance placement, and the claim must include the appliance placement date that matches the previously reimbursed banding claim. Claims with mismatched dates will be denied.
Action Required
Immediately: Billing team must update orthodontic billing procedures to ensure CDT D8670 claims are submitted in exact three-month intervals from appliance placement date. Include the appliance placement date on all D8670 claims and verify it matches the previously reimbursed banding claim date. Train staff to cross-reference placement dates before claim submission. Claims with mismatched dates will be denied by Washington State HCA.