What D8670 means

D8670 covers a periodic orthodontic treatment visit. "D" is dental, "86" is the orthodontic adjunctive group, and "70" is this periodic visit. During active orthodontic treatment (braces or aligners), the patient returns regularly so the orthodontist can adjust the appliances and monitor progress — tightening or changing the archwires, changing elastics or other components, checking that the teeth are moving correctly, and making any needed modifications. D8670 represents these ongoing adjustment visits, as distinct from the initial placement of the braces or the final removal.

These visits are typically scheduled every 4 to 8 weeks throughout the treatment. They're essential to the process — orthodontic tooth movement happens incrementally, and the regular adjustments at these visits drive the continued progress toward the final result.

How D8670 is used in billing depends on the arrangement: in comprehensive treatment, the periodic visits are often part of the overall case fee (D8080/D8090), and in plans that pay orthodontic benefits in installments, the periodic visits frequently serve as the trigger for those ongoing installment payments. It references the original appliance placement date and the total months of treatment. It's distinct from the comprehensive treatment code and from retention (after braces come off).

When it's typically used

D8670 is reported for the routine, recurring adjustment visits during active orthodontic treatment — typically every 4–8 weeks — where the orthodontist adjusts the wires, changes elastics, and monitors progress, often serving as the trigger for installment payments of orthodontic benefits.

How much does D8670 cost?

Periodic orthodontic visits are usually part of the overall comprehensive treatment fee rather than separately charged to the patient — the case fee (D8080/D8090) typically includes the regular adjustment appointments. When itemized, each periodic visit represents a portion of the total treatment cost.

Is D8670 covered by insurance?

In comprehensive cases, periodic visits are often included in the overall case fee. For insurance, D8670 frequently serves as the mechanism for installment payments — plans that pay orthodontic benefits over time may release each installment as periodic visits are reported, referencing the appliance placement date and total treatment months. It shouldn't be billed on the same day as conflicting ortho codes.

What happens at an orthodontic adjustment visit

The periodic adjustment visit is the routine appointment that keeps orthodontic treatment progressing, and knowing what happens at these visits demystifies the ongoing process.

At a typical adjustment visit, the orthodontist or their team checks how the teeth have moved since the last appointment and makes adjustments to continue the progress. For traditional braces, this often involves changing or adjusting the archwire (the wire that runs across the brackets and applies the force to move the teeth) — sometimes moving to a different wire as treatment progresses — and replacing the small elastic ties that hold the wire to the brackets, as well as changing any elastics (rubber bands) the patient wears. They also check the brackets, address any that have come loose, and monitor the bite and overall progress. For clear aligner treatment, periodic visits involve checking progress and providing the next sets of aligners.

These visits are usually fairly quick. After an adjustment, it's common to feel some soreness or pressure for a day or two as the teeth respond to the new forces, which then settles. The regular cadence of these visits — typically every 4 to 8 weeks — keeps the teeth moving steadily toward their final positions. Attending them as scheduled is important, since gaps in the adjustments can slow treatment. These routine appointments are the engine of orthodontic progress, gradually guiding the teeth into alignment over the course of treatment.

Why orthodontic treatment requires regular visits

The need for frequent, regular visits is fundamental to how orthodontics works, and understanding why explains the commitment involved in treatment.

Orthodontic tooth movement is a gradual biological process: applying gentle, steady force to a tooth causes the bone around it to remodel over time, allowing the tooth to move slowly into a new position. This can't be rushed — moving teeth too fast risks damaging them or the supporting bone. So treatment proceeds in increments, with the appliances applying controlled forces that move the teeth a little at a time. The regular adjustment visits are where the orthodontist updates those forces — as teeth move and the initial force dissipates, new adjustments (wire changes, etc.) are needed to continue the movement in the planned direction.

Without these periodic adjustments, progress would stall — the teeth would move as far as the current setup allows and then stop. The recurring visits keep applying fresh, appropriately-directed forces to march the teeth toward their final positions step by step. This is why orthodontic treatment takes many months to a few years and requires consistent appointments throughout, rather than being a one-time procedure. The commitment to regular visits is part of what makes orthodontic treatment work, and missing or delaying appointments extends the overall treatment time. Understanding this helps patients appreciate why the periodic visits matter and why keeping them is important for finishing treatment on schedule.

How periodic visits relate to orthodontic billing

Periodic visits play a specific role in how orthodontic treatment is billed and how insurance pays, which is worth understanding.

In comprehensive orthodontic treatment, the overall case fee (D8080 for adolescents, D8090 for adults) typically encompasses the entire treatment, including the regular adjustment visits — so patients usually don't pay separately per adjustment; it's all part of the total fee, often arranged as a payment plan. For insurance, orthodontic benefits are commonly paid in installments over the course of treatment rather than all at once, and the periodic visit code (D8670) frequently serves as the trigger for these installment payments: as treatment continues and periodic visits are reported, the plan releases each scheduled installment of the orthodontic benefit. This is why the periodic visit references the original appliance placement date and the total estimated months of treatment — to track the treatment timeline for the installment schedule.

So D8670 functions partly as a billing and payment-tracking mechanism in the orthodontic process, not just a clinical event. For patients, the practical takeaways are that the adjustment visits are generally included in the overall treatment cost, and that their insurance (if it covers orthodontics) pays out over the treatment period as these visits occur, rather than in a lump sum. Understanding this helps make sense of how orthodontic fees and insurance payments are structured around the ongoing treatment, with the periodic visits marking the progress that drives both the clinical results and the payment timeline.

Caring for your teeth during orthodontic treatment

The months of active treatment between and during periodic visits require good oral care, which is essential for a healthy result.

Braces and aligners make oral hygiene more challenging but more important. With braces, food and plaque easily get trapped around brackets and wires, so thorough brushing after meals and careful flossing (using floss threaders, interdental brushes, or a water flosser to clean around the appliances) are crucial to prevent cavities and gum problems. Neglecting hygiene during treatment can lead to decay or white spots on the teeth and gum inflammation, which would mar the result of an otherwise successful straightening. With clear aligners, the teeth are easier to clean (the trays come out), but the aligners themselves must be cleaned and the teeth brushed before reinserting them. Avoiding hard, sticky, and sugary foods (especially with braces) protects both the appliances and the teeth.

The periodic visits are also opportunities for the orthodontist to check oral health and remind patients about hygiene. Maintaining good care throughout treatment ensures that when the braces come off or the aligners are done, the newly-straightened teeth are also healthy — not straightened but damaged by decay or gum disease from poor hygiene. Keeping up with regular dental cleanings (with the general dentist) during orthodontic treatment is also recommended. Good home care between the periodic adjustment visits is the patient's key contribution to a successful, healthy orthodontic outcome.

Frequently asked questions

What is the D8670 dental code?

It's a periodic orthodontic treatment visit — the routine adjustment appointments during active braces or aligner treatment, typically every 4–8 weeks, where the orthodontist adjusts wires, changes elastics, and checks progress.

What happens at an orthodontic adjustment visit?

The orthodontist checks the teeth's movement and adjusts the appliances — changing or adjusting the archwire, replacing elastic ties and bands, fixing loose brackets, and monitoring progress (or providing new aligners).

How often are orthodontic visits?

Typically every 4 to 8 weeks throughout treatment, to keep applying fresh forces and continue the teeth's movement toward their final positions.

Do I pay separately for each adjustment visit?

Usually not — in comprehensive treatment, the overall case fee (D8080/D8090) typically includes the regular adjustment visits, often arranged as a payment plan.

How does D8670 relate to insurance?

Orthodontic benefits are often paid in installments, and the periodic visit code frequently triggers each installment payment as treatment continues, referencing the appliance placement date and total months.

Why does orthodontic treatment need so many visits?

Tooth movement is gradual — bone remodels slowly around moving teeth. Regular adjustments apply fresh forces to keep the teeth moving, so treatment requires consistent visits over months to years.

This page is an independent, plain-language explanation for general information only. It is not billing, coding, or clinical advice. For the official CDT descriptor and current-year wording, refer to the American Dental Association.