To get braces covered by medical insurance, you have to show the treatment is medically necessary rather than cosmetic, submit a pre-authorization request with the right clinical evidence and billing codes, and be ready to appeal if the first answer is no. Medical plans set a high bar. Straightening crowded or gapped teeth for appearance won’t qualify. Correcting a jaw deformity, a cleft palate, or a malocclusion severe enough to interfere with eating, breathing, or speaking often will.
What Counts as Medically Necessary
Every insurer draws the same line: cosmetic on one side, medically necessary on the other. To cross into medical necessity, the orthodontic problem has to cause a functional impairment or stem from a qualifying medical condition.
The conditions that most commonly qualify:
- Cleft lip or cleft palate, where orthodontics restores function after surgical repair.
- Craniofacial anomalies producing a severe, handicapping malocclusion.
- Obstructive sleep apnea, when jaw alignment contributes to airway obstruction and orthodontics is part of a surgical treatment plan.
- Documented difficulty eating, speaking, or breathing, supported by clinical records rather than patient description alone.
What surprises many people is how narrow the criteria are. Crowded teeth, gaps, moderate overbite, and even temporomandibular joint (TMJ) problems are typically excluded. At least one major insurer’s clinical policy, reviewed as recently as March 2026, classifies orthodontic treatment for TMJ disorders as unproven and not medically necessary. Overbite and overjet without an underlying craniofacial deformity usually won’t qualify either.
Insurers and state Medicaid programs use scoring tools to measure severity. The American Association of Orthodontists has worked with payers on standardized “auto-qualifier” criteria that can automatically establish medical necessity for the most severe cases, and some states have adopted those standards directly.1American Association of Orthodontists. Medically Necessary Orthodontic Care: AAO Initiative Advances Other programs use point-based indices like the Handicapping Labio-Lingual Deviation (HLD) index, with minimum score thresholds a case must meet before treatment is approved.
Check Your Policy Before You Call the Orthodontist
Pull up your plan’s Summary of Benefits and Coverage and look for language about orthodontic treatment under the medical benefit, not just the dental benefit. Things to confirm:
- Whether orthodontic treatment is listed at all. Some medical plans exclude it entirely and leave it to dental coverage.
- Age limits. Many plans restrict medically necessary orthodontic coverage to members under 19. Adults with the same conditions face stricter documentation or outright exclusions.
- Lifetime maximums. Even plans that cover orthodontics often cap the benefit, sometimes at a few thousand dollars.
- Waiting periods. Recently enrolled? Your plan may impose a six- to twelve-month wait before major services are covered.
- Deductibles and coinsurance. Most medical plans require you to meet an annual deductible before coverage starts. After that you’ll owe a percentage of the remaining cost.2HealthCare.gov. Deductible
Write down the exact terms your plan uses. If the policy mentions “congenital anomaly,” “handicapping malocclusion,” or “functional impairment,” those are the conditions you’ll need to prove, and your orthodontist’s letter should mirror that language.
For children 18 and under, the Affordable Care Act requires marketplace health plans to include pediatric dental as an essential health benefit, either built into the health plan or offered as a separate dental plan.3HealthCare.gov. Dental Coverage in the Health Insurance Marketplace Whether that pediatric benefit includes orthodontics depends on the plan and your state’s benchmark. Not every plan covers braces, but the requirement gives families a starting point.
Get Pre-Authorization Before Treatment Starts
Most insurers require pre-authorization before orthodontic treatment begins. Skip this step and you risk paying the entire bill yourself, even if the treatment would have been approved.
Pre-authorization means submitting a request, along with diagnostic records, before any bands or brackets go on. Your orthodontist’s office usually handles the submission, but follow up directly with your insurer to confirm they received everything. The package typically includes panoramic and cephalometric X-rays, clinical photographs, dental impressions or digital scans, and a written treatment plan.
Expect several weeks. Delays are common when the insurer asks for additional records or wants a second opinion from its own reviewer. If you haven’t heard back in a few weeks, call. Claims don’t move faster when nobody’s watching them.
Build the Claim: Letter, Records, and Codes
The core of any medical insurance claim for braces is the letter of medical necessity. Written by your orthodontist or a referring physician, it should describe the diagnosed condition, the functional impairment it causes, and why orthodontic treatment is the appropriate remedy. Generic letters get denied. The letter has to speak directly to the criteria in your policy.
Along with the letter, you’ll typically submit:
- Panoramic X-rays and cephalometric films showing jaw structure and tooth positioning.
- A formal treatment plan describing scope, estimated duration, and expected outcome.
- Intraoral and extraoral clinical photographs documenting the condition.
Billing Codes and Forms
When braces are billed to medical insurance, the claim is usually submitted on a CMS-1500 form, the standard form for non-hospital medical services.4Centers for Medicare & Medicaid Services. CMS 1500 Hospital-based services use the UB-04.
Standard orthodontic treatment (braces, adjustments, retainers) is normally coded using CDT codes in the D8000 range, the dental profession’s standard code set. Some medical insurers accept CDT codes on the CMS-1500; others require CPT codes. If the treatment includes surgical procedures like jaw repositioning, those are billed with CPT codes accompanied by ICD-10 diagnosis codes for the underlying condition. Common ICD-10 codes for orthodontic claims fall under the M26 category (dentofacial anomalies), including major jaw-size anomalies (M26.0), jaw-cranial base relationship problems (M26.1), and dental arch relationship abnormalities (M26.2). Wrong codes are one of the fastest routes to rejection, so confirm with both your provider’s billing department and your insurer which set they want.
If You’re Denied
A denial isn’t the end of the road. Medically necessary orthodontic claims are commonly denied on the first pass, and the appeal process exists for exactly this.
Read the denial letter carefully. It states the specific reason your claim was rejected and outlines the deadline and process for appealing. Under federal rules, you have 180 days from receiving the denial to file an internal appeal.5HealthCare.gov. Appealing a Health Plan Decision – Internal Appeals The insurer must complete internal review within 30 days for services not yet received, or 60 days for services already provided.
A strong appeal targets the specific reason for denial. If the insurer said evidence of functional impairment was insufficient, get a more detailed letter from your orthodontist. If they questioned whether alternative treatments were tried first, provide documentation of prior treatments that failed. New diagnostic images, updated clinical notes, or supporting statements from other specialists can all strengthen the case.
External Review
If your internal appeal is denied, you have a federal right to an external review by an independent third party with no connection to your insurer. File this request within four months of receiving the final internal appeal denial. The external reviewer’s decision binds the insurer: if the reviewer sides with you, your insurer must pay.6HealthCare.gov. External Review Standard external reviews must be completed within 45 days. For urgent situations, the timeline shrinks to 72 hours or less.
External review is underused. Many people give up after losing an internal appeal, not realizing an independent reviewer often sees the case differently than the insurer’s own staff. If both internal and external appeals fail, a complaint to your state’s department of insurance is another option.
Coordinating Medical and Dental Coverage
If you have a medical plan and a standalone dental plan, figuring out which pays first matters. When the same treatment could fall under either, the medical plan is generally primary. It pays first, and the dental plan may pick up some of the remaining balance as secondary.
For children covered under two parents’ plans, insurers typically use the “birthday rule”: the plan belonging to the parent whose birthday falls earlier in the calendar year (month and day only) pays first. Court orders in divorce or custody agreements can override this default.
Before treatment starts, call both insurers. Confirm which plan is primary, what each will cover, and what documentation the secondary plan needs from the primary’s explanation of benefits. Coordination mistakes lead to rejected claims and surprise bills.
One more piece of the cost equation: staying in-network. Insurers negotiate discounted rates with in-network providers, and out-of-network orthodontists can bill you for the difference between their full fee and what the insurer considers reasonable. That gap adds up quickly on a treatment that can run $5,000 to $6,000 or more. Verify network status with your insurer directly, not just through the provider’s office.
Paying for What Insurance Won’t Cover
Even approved claims rarely cover the full cost, and some plans won’t cover braces at all. Several tools can reduce what comes out of pocket.
HSAs and FSAs
A Health Savings Account or Flexible Spending Account lets you pay for orthodontic treatment with pre-tax dollars. The IRS treats braces as a deductible medical expense.7Internal Revenue Service. Publication 502 (2025), Medical and Dental Expenses
For 2026, you can contribute up to $4,400 to an HSA with self-only coverage, or $8,750 with family coverage.8Internal Revenue Service. IRS Notice 26-05 – HSA Inflation Adjustments HSA funds roll over year to year, so you can save up for a large expense. Health care FSAs have a lower limit (around $3,400 for 2026) and generally must be used within the plan year, though some plans offer a grace period of up to two and a half months or allow a small carryover.9Internal Revenue Service. Health Savings Accounts and Other Tax-Favored Health Plans
Medicaid for Children
Medicaid must cover medically necessary orthodontic treatment for eligible children under the Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit. Cosmetic orthodontics is excluded, but treatment needed to restore oral function qualifies.10Medicaid.gov. EPSDT – A Guide for States: Coverage in the Medicaid Benefit Each state sets its own scoring threshold for what counts as severe enough, so a case that qualifies in one state might not in another.
Tax Deductions and Payment Plans
If your total unreimbursed medical expenses for the year exceed 7.5% of your adjusted gross income, you can deduct the excess by itemizing on your federal return, and orthodontic costs count toward that total.11Internal Revenue Service. Topic No. 502, Medical and Dental Expenses The deduction only helps if your total itemized deductions exceed the standard deduction, which limits its usefulness for many families. In a year with a large orthodontic bill plus other medical costs, run the numbers.
Many orthodontic offices offer in-house payment plans that spread the cost over treatment, sometimes with no interest. Third-party healthcare credit companies are another option, though their interest rates after any promotional period can be steep. Some providers give a discount for paying in full upfront. Dental schools with orthodontic residency programs sometimes provide treatment at reduced rates, supervised by faculty. Combining approaches (HSA funds for part of the cost, a payment plan for the rest, a tax deduction at year-end) can meaningfully reduce what would otherwise be a $5,000-plus expense.