D3348 — Retreatment of previous root canal therapy — molar
Retreatment is a second root canal on a tooth that has already had one. D3348 is the version for a molar.
Among the three codes in this group it is the workhorse — the one most practices report by default. The procedure behind it is explained at length in the endodontic retreatment guide.
Four things follow: the conditions, the cost, the coverage, and the difference between this code and each one it sits beside.
D3348 in detail
Tooth — a molar, furthest back and hardest to access, where moisture control and a clear view are the practical limits on how good the result can be.
Not to be confused with
D3347 — Retreatment of previous root canal therapy — premolar: It applies to premolars rather than molars.
D3346 — Retreatment of previous root canal therapy — anterior: It applies to front tooths rather than molars.
Those two codes and D3348 are the whole group — nothing else describes this procedure. There is no penalty for asking which of these is planned, and there is a real cost to finding out from an explanation of benefits weeks later.
Every code in this group
These codes describe the same broad procedure and differ in one respect each. Each has its own page with its own fee range and coverage notes.
| Code | Procedure |
|---|---|
| D3348 | Retreatment of previous root canal therapy — molar — this page |
| D3346 | Retreatment of previous root canal therapy — anterior |
| D3347 | Retreatment of previous root canal therapy — premolar |
Questions about D3348
What does dental code D3348 mean?
It is the entry for retreatment of previous root canal therapy, molar. A practice cannot use it for anything broader than that, which is what makes the code useful to you.
What should I expect to pay for D3348?
Plan for $1,200–$2,400 as the full fee. Two practices a few miles apart can sit at opposite ends of that range for the same work.
How do dental plans handle D3348?
Yes on most policies, treated as basic / major work at typically 50–80%. A waiting period on a new policy is the commonest reason it is not.
What is the difference between D3348 and D3347?
D3347 is retreatment of previous root canal therapy, premolar: it applies to premolars rather than molars. Nothing else separates them, which is exactly why a claim submitted under the wrong one of the two is such a common correction.
Also known as: root canal retreatment, failed root canal, redo root canal, endodontic revision.