D3331 — Treatment of root canal obstruction; non-surgical access
D3331 clears a blockage in a canal — a ledge, a calcification, a separated file — without resorting to surgery.
This is one of four closely related endodontic complications and obstructions codes. The treatment is explained in full in the endodontic complications and obstructions guide — this page is about what makes this particular code different.
Read on for the conditions this code carries, the money involved, the way a payer is likely to treat it, and a plain comparison against each of the codes it is easily mistaken for.
D3331 compared with its closest relatives
D3332 — Incomplete endodontic therapy; inoperable, unrestorable, or fractured tooth: It is billed when root canal treatment has to be abandoned because the tooth turns out to be unrestorable or fractured.
D3333 — Internal root repair of perforation defects: It repairs a perforation in the root from the inside, sealing a hole made by decay, resorption or an instrument.
D3911 — Intraorifice barrier: It places a barrier over the canal openings after root canal treatment, sealing them off from anything above.
Those three codes and D3331 are the whole group — nothing else describes this procedure. None of these are interchangeable, even though they sound as though they might be. Checking that the code on your estimate is the one that matches the planned treatment takes a minute and prevents most billing surprises.
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 |
|---|---|
| D3331 | Treatment of root canal obstruction; non-surgical access — this page |
| D3332 | Incomplete endodontic therapy; inoperable, unrestorable, or fractured tooth |
| D3333 | Internal root repair of perforation defects |
| D3911 | Intraorifice barrier |
Questions about D3331
What procedure is D3331?
The procedure behind the number is treatment of root canal obstruction; non-surgical access, filed under endodontics.
What should I expect to pay for D3331?
Usually somewhere in $250–$700 as a gross fee. The code fixes what was done, not what it costs, so ask for the practice's own figure in writing.
Is D3331 a covered benefit?
Typically, yes — basic / major benefits, variable. What varies between plans is the frequency limit rather than whether the procedure is covered at all.
What is the difference between D3331 and D3332?
D3332 is incomplete endodontic therapy; inoperable, unrestorable, or fractured tooth: it is billed when root canal treatment has to be abandoned because the tooth turns out to be unrestorable or fractured. They share a section of the code set and very little else, so the comparison worth making is on what each involves rather than on which is cheaper.
Also known as: blocked canal, separated instrument, root perforation, incomplete root canal.