D8670 is the CDT code for a periodic orthodontic treatment visit — the recurring adjustment appointment that takes place during active orthodontic treatment, as part of a treatment contract. It represents one ongoing visit in a course of care, not the initial banding or the final retention.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D8670 Code
Report D8670 for the routine, recurring visits during active orthodontic treatment — the periodic "adjustment" or "tightening" appointments where wires are changed, brackets checked, and progress assessed under an existing treatment plan. Many practices report these as the periodic installments of a banded orthodontic case.
Code by the phase of care. Don't confuse D8670 with the comprehensive treatment codes that establish the case (the D8070–D8090 series), with the pre-treatment monitoring exam (D8660), or with retention at the end of treatment (D8680). D8670 is specifically the during-treatment periodic visit, and how a practice reports it often depends on whether the case is billed as a lump sum or in periodic payments.
Documentation & Clinical Scenarios
Because D8670 is a recurring charge tied to an active contract, the chart should connect each visit to ongoing care:
- Reference to the active treatment plan the visit falls under (which case, which arch).
- What was done at the visit — wire change, adjustment, progress check, appliance check.
- Progress notes showing the case is advancing as expected.
- Dates and intervals consistent with the practice's periodic-billing schedule.
How periodic visits map to billing varies: some plans pay orthodontic benefits in installments tied to D8670 visits, while others pay against the global case fee. Repairs, replacements, or problems between visits may be billed separately under their own codes. Keep each visit's note distinct so recurring D8670 entries are clearly supported.
Insurance & Billing Tips
- Confirm the payment model. Many ortho plans pay an initial amount at banding, then periodic installments — verify whether those installments map to D8670.
- Match the contract. Report periodic visits in line with the treatment contract and the plan's installment schedule.
- Track the orthodontic maximum. Periodic visits draw against a lifetime ortho benefit; monitor the running total.
- Don't double-report bundled work. Routine adjustments are typically part of the periodic visit, not separately billable.
- Separate true extras. Emergency repairs or appliance replacements between visits carry their own codes.
Example Case
A teenager in active braces comes in every several weeks for adjustments under a banded treatment contract. At each visit the orthodontist changes the archwire, checks the brackets, and notes that the case is progressing on schedule. The office reports each of these recurring appointments as D8670, in line with the plan's installment schedule, while the lifetime orthodontic benefit is tracked down with each payment. When a bracket later breaks between visits, that repair is documented and billed separately rather than rolled into the periodic visit.
Patients call to book "my next adjustment" or "my monthly braces visit," not D8670. DentalReception AI answers those calls 24/7, books the adjustment live into your schedule, and captures insurance details, while clinical and coverage questions route to your team. See how it handles braces calls and orthodontic wire emergency calls, or book a demo.
Frequently Asked Questions
What's the difference between D8670 and D8660?
Phase of care. D8670 is the periodic treatment visit during active orthodontics — the recurring adjustment once appliances are on. D8660 is the pre-treatment growth-monitoring exam, used before treatment starts to decide when to begin. D8660 comes first and precedes appliances; D8670 happens repeatedly during active treatment, so they should never be swapped.
Are routine adjustments billed separately under D8670?
Generally the periodic visit is the adjustment — wire changes and routine checks are part of the D8670 visit, not separately billable add-ons. What can be billed separately are true extras, such as repairing a broken bracket or replacing a lost appliance between visits, which carry their own codes. Document each visit so it's clear what was routine versus a separate procedure.
How does insurance pay for periodic ortho visits?
Many plans pay orthodontic benefits in installments — an initial amount near banding, then periodic payments that may map to D8670 visits — all drawing against a lifetime orthodontic maximum. Others pay against a global case fee. Confirm the plan's payment model and remaining maximum so each periodic visit is reported correctly and the patient's running balance stays accurate.
Do I need a pre-authorization for D8670?
Pre-authorization usually happens at the start of the orthodontic case rather than for each periodic visit. Once the case and its installment schedule are approved, D8670 visits typically follow that authorization. Still, verify the plan's installment rules and the remaining orthodontic maximum so each periodic claim is paid as expected and the patient's portion is quoted accurately.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.