Is a post and core after a root canal covered by insurance?
Usually yes, as a major service at around 50% on most plans, but only on a tooth that has already had a root canal. A post and core (code D2954) is a ready-made post cemented down into the treated root canal, plus the rebuilt core around it, giving a badly broken tooth an anchor for its crown.
50%
Major, root canal teeth only
Root canal first
A post only pays on a tooth that has had a root canal. Bill it on a live tooth and most plans deny it on sight.
One code, not two
D2954 already includes the core. Adding a separate build-up (D2950) on the same tooth is the fastest way to get the whole claim kicked back.
Match the endo
If another office did the root canal, get the date and the tooth number. Payers match the post to a completed D3310, D3320, or D3330 on that tooth.
Three-code bill
Root canal, post, crown. Three big codes on one tooth can blow through the annual maximum. One check shows what is left before the patient asks.
What would a real check show for this patient's D2954?
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 · D2954
Sample- Coverage
- Active, major covered at 50%
- Frequency
- Once per tooth, root canal on file
- 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 D2954 is the right code
- The tooth has a completed root canal
- Too little tooth remains to hold a crown alone
- Post is prefabricated, not custom cast in a lab
- Core is included, no separate D2950 billed
Documentation payers expect
The root canal date and provider, a post-treatment X-ray showing the post in the canal, and notes on how little tooth structure remained. Include the crown code planned for the tooth.
Why post and cores get denied
What happens after the post and core
The post is the middle of a three-part story: root canal (D3310 to D3330), post and core (D2954), crown (D2740 or D2750). Each one is a separate claim, and the third often lands in a new plan year or after the annual maximum is spent. If the root canal was done elsewhere, the crown office inherits the paperwork for all of it. The desks that keep this calm check the plan once, at the first visit, and quote the full three-code total against the remaining max before the patient asks.
D2954, quick answers
Is a post and core covered by insurance?
Most plans cover D2954 as a major service at around 50%, but only on a tooth that has had a root canal.
What if the tooth never had a root canal?
Then the post has nowhere to go and the claim denies. A live tooth that needs rebuilding is a core build-up (D2950), not a post.
The root canal was done at another office. Does that matter?
It can. The plan needs the root canal date and the treated tooth on file. Send the date, the provider, and the X-ray with the post claim.
Is the core billed separately?
No. D2954 covers the post and the core together, and adding a D2950 on the same tooth gets one of them denied.
How much of the annual maximum does this use?
Root canal, post, and crown on one tooth can use a large share of the annual maximum. The check shows what is left so the desk can plan the visits and the quote.
More questions? Schedule 15 minutes with us and bring your toughest plan.
Root canal, post, crown. One check covers all three.
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Related: D2950 · D3330 · D2740
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.