Is a root canal on a premolar covered by insurance?
Usually yes, but at what percentage is the real question. Some plans treat a premolar root canal as basic and pay around 80%; others treat it as major and pay around 50%. A premolar root canal (code D3320) is the full nerve removal, cleaning and sealing on one of the two teeth between your canine and your molars.
50 to 80%
Depends how the plan labels root canals
Two-canal tooth
Premolars usually have one or two canals, and the fee sits between the front tooth and the molar. The plan's percentage does not change with the canal count.
30 point swing
Basic at 80% versus major at 50% is a 30 point difference on a mid-size fee. That gap is the whole reason to check the category first.
Crown usually next
A build-up (D2950) and crown (D2750) commonly follow a premolar root canal. Both are major on most plans, and both sit behind a major waiting period.
Max left matters
A root canal plus a crown can use up a whole annual max. One check before the visit shows what is left, so the desk quotes the real balance.
What would a real check show for this patient's D3320?
Pick a sample plan and type your fee. This is the visibility a real-time check gives the desk for every actual patient, in under a second.
Eligibility readout · D3320
Sample- Coverage
- Active, basic covered at 80%, deductible unmet
- Frequency
- Once per tooth number
- Patient share
- Type your fee to see it
Estimate from a sample plan. A real check reads the actual plan in under a second.
When D3320 is the right code
- A first or second premolar, upper or lower
- Entire nerve removed from every canal in the tooth
- Canals sealed, confirmed on a final X-ray
- No prior root canal on this tooth number
Documentation payers expect
Before and after X-rays, a note naming the tooth number and the number of canals treated, and the reason the nerve had to come out. Plans that call it major may also want prior authorization.
Why premolar root canals get denied
What happens after the premolar root canal
The premolar is where the second half of the bill arrives. A build-up (D2950) and a crown (D2750) often follow, and on most plans those are major at around 50% with a waiting period of their own. Add a root canal filed as major and the patient spent most of an annual max on one tooth. The practices that never have that conversation twice quote the root canal and the crown together on day one, which takes the plan's category, deductible and remaining max, which takes one check.
D3320, quick answers
Does insurance cover a premolar root canal?
Most plans do. The percentage depends on the plan's category: about 80% when root canals are basic, about 50% when they are major.
How many times will a plan pay for D3320 on one tooth?
Once. If the tooth needs to be redone, that is a retreatment code (D3347) with its own waiting expectations.
Is the crown part of the root canal fee?
No. The build-up (D2950) and crown (D2750) are separate codes, major on most plans, and often sit behind a 12-month waiting period.
Does a premolar root canal need prior authorization?
Sometimes, mostly on plans that file it as major. Checking D3320 against the plan before scheduling tells the desk whether to send one.
Why is the patient's share so different from their last root canal?
Different plan, different category. The same procedure can be 20% out of pocket on one plan and 50% on the next, before the deductible.
More questions? Schedule 15 minutes with us and bring your toughest plan.
Every premolar root canal, quoted from the plan's real numbers.
First month free, then $2.50 a check. No seat fees, no contract.
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CDT is maintained by the American Dental Association. This page is Valian's own plain-English summary for front-desk teams, not official CDT descriptor text, and is not billing or clinical advice. Coverage patterns are common plan behaviors; every plan differs. Verify benefits before treatment.