Is a large white filling covered by insurance?
Usually yes, as a basic service at 70 to 80%, with two catches. A three-surface white filling on a back tooth (code D2393) is a large tooth-colored filling rebuilding three sides of a molar or premolar. Many plans pay it at the metal filling rate (D2160), and some ask for X-rays or a note because a filling this big sits close to crown territory.
70 to 80%
Basic, downgrade plus a size review
Paid at D2160
Many plans pay this at the three-surface silver rate. On a filling this size, the difference between the two fees is one of the biggest gaps a patient sees.
Narrative or X-ray
Some plans want a current X-ray or a short note on three-surface composites. Send it with the claim and skip the records request that follows.
24 months
The replacement window per surface on most plans. Three surfaces on one tooth means three clocks, and the plan checks every one of them.
Two answers
Does this plan downgrade, and how much of the annual max is left for a filling this size? One check answers both before the patient asks.
What would a real check show for this patient's D2393?
Pick a sample plan and type your per-tooth fee. This is the visibility a real-time check gives the desk for every actual patient, in under a second.
Eligibility readout · D2393
Sample- Coverage
- Active, basic covered at 80%, paid at the white filling fee
- Frequency
- Once per surface / 24 months
- 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 D2393 is the right code
- Back tooth, molar or premolar
- Tooth-colored filling
- Three surfaces of one tooth in a single filling
- All three surface letters on the claim
- Filled, not crowned, with the reason charted
Documentation payers expect
Tooth number, all three surface letters, a current X-ray, and a short note on why a filling was the right choice. Plans that review large composites want this before they pay.
Why large white fillings get denied (or downgraded)
What happens after the large white filling
Of all the fillings, this one sits closest to a crown. If a three-surface composite cracks, the next code is D2740 or D2750, often with a build-up (D2950), and the plan's share falls from basic at 80% to major at 50%, sometimes behind a 12-month waiting period. Before that, the EOB for today's filling may already show a downgrade to the D2160 rate. Two bills, two surprises, both avoidable when the desk knows the plan's downgrade rule and major percentage first, which takes one check.
D2393, quick answers
Is a large white filling covered?
Usually, as a basic service at 70 to 80% on most plans, with two catches: many pay the three-surface silver rate (D2160), and some review a filling this size.
Why does the plan want an X-ray for a filling?
Three surfaces means most of the tooth is rebuilt, and some plans check that a crown was not the real job. Sending the X-ray with the claim avoids the records request.
How big is the downgrade on D2393?
It is the difference between the practice's three-surface white and silver fees, and it grows with each surface. Quote it before the visit, not after the EOB.
What is the replacement window?
Typically 24 months per surface. Three surfaces means three clocks the plan checks.
What happens if the tooth needs a crown next?
A crown (D2740 or D2750) is a major service at 50% on most plans, sometimes behind a waiting period. One check shows the major rate and the annual max remaining.
More questions? Schedule 15 minutes with us and bring your toughest plan.
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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.