NHS Orthodontic Re-referral: Restarting Treatment After Discharge

What happens when you are discharged from NHS orthodontic treatment?

Discharge from NHS orthodontic treatment typically occurs in one of three scenarios. First, treatment is completed and the patient moves into retention — this is a routine discharge and does not trigger re-referral issues. Second, a patient fails to attend appointments repeatedly and the orthodontist discharges them for non-attendance. Third, a patient on a waiting list does not respond to an appointment offer and is removed. In the second and third scenarios, the NHS contract is considered discharged and restarting treatment requires a fresh referral pathway. NHS England 2026/27 commissioning guidance makes clear that discharged patients are not automatically entitled to restart treatment at the same point — they re-enter the pathway from the beginning.

Does previous NHS treatment affect your eligibility for re-referral?

Previous receipt of NHS orthodontic treatment does not automatically disqualify you from re-referral, but it is a material factor. NHS commissioning guidance allows for a second course of treatment only in defined exceptional circumstances. For under-18s who were discharged for clinical reasons, re-referral on IOTN grounds follows the same threshold as a new patient — IOTN DHC grade 4 or 5 or an AC score of 4 in most commissioning areas. For adults, NHS adult orthodontics is already restricted to exceptional circumstances regardless of whether they have had previous treatment, so prior treatment is one of several factors considered when determining whether the bar is met.

How does IOTN re-assessment work for re-referral?

The Index of Orthodontic Treatment Need (IOTN) is used to assess whether a patient's malocclusion reaches the threshold for NHS-funded treatment. For re-referral, the dental health component (DHC) of the IOTN is the primary clinical tool. A dentist or orthodontist assesses the current state of the teeth — not the position before any previous treatment — and assigns a grade from 1 to 5. Grades 4 and 5 indicate definite treatment need. Grade 3 is borderline and subject to local commissioning decisions. An important practical point: if previous treatment was completed and the teeth have relapsed, the relapsed position is what gets assessed, not the original malocclusion. Significant relapse can therefore sometimes meet the IOTN threshold for a second course of treatment.

When can adults be re-referred for NHS orthodontics?

NHS orthodontic treatment for adults is commissioned under exceptional circumstances only. The main qualifying clinical categories recognised in NHS England guidance include: severe hypodontia (multiple missing permanent teeth, often meeting criteria for implant preparation orthodontics), orthognathic surgery cases where orthodontic preparation and finishing are integral to the surgical plan, cleft lip and palate or other craniofacial anomalies, and cases where significant trauma or pathology has caused teeth to migrate in a way that meets the relevant IOTN criteria. Simple adult crowding, spacing, or relapse after private treatment does not meet the threshold for NHS-funded adult re-referral in most areas. Patients seeking re-referral for non-exceptional reasons are typically advised to seek private treatment.

What do GPs and dentists need to do to re-refer?

Re-referral follows the same administrative pathway as an initial referral in most NHS areas. A GDP (general dental practitioner) completes a referral form, assesses or documents the IOTN grade, and sends the referral to the local orthodontic assessment service or directly to a specialist orthodontic provider depending on the local pathway. GPS can also refer directly in some areas where direct GP orthodontic referral is accepted, but this is less common. The referral should clearly document the clinical grounds for re-referral, particularly for adult exceptional cases — the more detail provided about the clinical complexity, the less likely the referral is to be triaged out. Referrals without adequate clinical information are frequently returned or declined by orthodontic triage panels.

Private treatment as an alternative to re-referral

For patients who do not meet the clinical threshold for NHS re-referral — particularly adults with relapse after completed treatment — private orthodontic treatment is the practical route. Private treatment offers broader clinical eligibility, greater choice of appliance type including ceramic braces, lingual braces, and clear aligners, and typically shorter waiting times than NHS pathways. The cost of private treatment varies considerably across the UK, but comprehensive fixed brace treatment for adults typically ranges from £2,500 to £6,000 depending on complexity and location. An online consultation or an in-person assessment with a specialist orthodontist can provide a cost estimate without commitment. Patients who are borderline for NHS exceptional criteria and also considering private treatment are advised to explore both options simultaneously rather than waiting for NHS decisions that may take several months.

Useful related pages

This guide is for general information only. It is not a diagnosis, treatment plan, or substitute for advice from a registered dentist or orthodontist.