D3950 — Canal preparation and fitting of preformed dowel/post
D3950 prepares the canal and fits a preformed post, the step between finishing a root canal and building the tooth back up.
It is one of three codes covering endodontic adjuncts. For the procedure itself rather than the code, see the endodontic adjuncts guide; for the code, read on.
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.
D3950 against the codes beside it
D3960 — Bleaching of discolored tooth (non-vital, internal): It bleaches a discoloured tooth from the inside after root canal treatment, the only way to lighten a tooth that darkened from within.
D3910 — Surgical isolation of tooth with rubber dam: It is the surgical isolation needed when a tooth cannot be sealed off with a rubber dam normally, because the gum has to be moved or the tooth built up first.
Those two codes and D3950 are the whole group — nothing else describes this procedure. Because the wording of these codes is so close, substituting one for another is a routine cause of rejected claims and of unexpected balances. If D3950 is on your estimate, it is worth confirming that the detail it specifies matches what is actually planned.
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 |
|---|---|
| D3950 | Canal preparation and fitting of preformed dowel/post — this page |
| D3910 | Surgical isolation of tooth with rubber dam |
| D3960 | Bleaching of discolored tooth (non-vital, internal) |
Questions about D3950
What does dental code D3950 mean?
On a claim, D3950 tells the insurer that what was performed was canal preparation and fitting of preformed dowel/post.
What is the typical fee for D3950?
Usually somewhere in $150–$400 as a gross fee. The code fixes what was done, not what it costs, so ask for the practice's own figure in writing.
Does dental insurance cover D3950?
It is generally a covered benefit in the basic category, variable. Frequency limits and waiting periods are the usual reasons a claim is refused.
What is the difference between D3950 and D3960?
D3960 is bleaching of discolored tooth, non-vital, internal: it bleaches a discoloured tooth from the inside after root canal treatment, the only way to lighten a tooth that darkened from within. Because they describe different work, D3950 and D3960 can legitimately appear on the same treatment plan — they are not alternatives to choose between.
Also known as: internal bleaching, non-vital bleaching, discoloured tooth, rubber dam isolation.