D3346 — Retreatment of previous root canal therapy — anterior
Retreatment is a second root canal on a tooth that has already had one. D3346 is the version for a front tooth.
three codes describe endodontic retreatment, and this is one of them. What separates it from the other two is the subject of this page; the endodontic retreatment guide covers the treatment itself.
Four things follow: the conditions, the cost, the coverage, and the difference between this code and each one it sits beside.
What has to be true for D3346 to apply
Tooth — a front tooth, where shade, translucency and the shape of the edge matter as much as strength.
D3346 compared with its closest relatives
D3347 — Retreatment of previous root canal therapy — premolar: It applies to premolars rather than front tooths.
D3348 — Retreatment of previous root canal therapy — molar: It applies to molars rather than front tooths.
Those two codes and D3346 are the whole group — nothing else describes this procedure. A single word separates several of these codes, and a payer reads that word literally. If the record does not support D3346 specifically, the claim comes back — usually repriced to whichever neighbouring code the reviewer thinks was actually performed.
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 |
|---|---|
| D3346 | Retreatment of previous root canal therapy — anterior — this page |
| D3347 | Retreatment of previous root canal therapy — premolar |
| D3348 | Retreatment of previous root canal therapy — molar |
Questions about D3346
D3346 — what is it?
It is the endodontics code for retreatment of previous root canal therapy, anterior, and it means that specific procedure and no other.
How much does D3346 cost?
Between $900–$1,700 in most practices — and that is the figure before any benefit is applied, not what you would pay at the desk.
Is D3346 a covered benefit?
Typically, yes — basic / major benefits, typically 50–80%. What varies between plans is the frequency limit rather than whether the procedure is covered at all.
What is the difference between D3346 and D3347?
D3347 is retreatment of previous root canal therapy, premolar: it applies to premolars rather than front tooths. That one difference is the whole distinction; the chair time, the materials and the appointment sequence are the same either way.
Also known as: root canal retreatment, failed root canal, redo root canal, endodontic revision.