Post and Core Dental Code (D2952): Cast

What D2952 covers

D2952 reports a cast post and core, fabricated indirectly, placed in addition to a crown. Two things define it. It is a post and core: a post seated in a root-canal-treated canal, with a core over it to support a crown. And it is cast: the post and core are custom-made as a single unit, typically by sending an impression or pattern to a lab rather than assembling stock parts chairside.

A cast post and core is the choice when a prefabricated post will not give the right fit or retention, often on a tooth with an irregular or tapered canal where a custom shape holds better. The tooth must have a completed root canal, because the post seats in the treated canal space.

It does not cover:

• A core buildup with no post in the canal. That is D2950.
• A prefabricated post and core. That is D2954.
• An additional cast post on the same tooth. That is D2953, used with D2952.
• An additional prefabricated post on the same tooth. That is D2957, used with D2954.
• The crown itself, which is billed separately (D2740, D2750, and the rest of the crown series).

D2952 versus D2950: the post is the dividing line

A buildup and a post and core look similar from across the room. The difference is whether anything seats into the root canal.

• D2950 rebuilds missing structure with buildup material (and pins if needed), with nothing anchored in the canal. It is used on teeth with enough structure to hold the buildup.
• D2952 anchors a custom cast post into a treated canal, with the core integral to it.

Because a post requires a treated canal, carriers cross-check D2952 against the endodontic history. D2952 on a vital, untreated tooth is a contradiction the carrier will catch. D2950 billed when a post was actually seated understates the procedure and mismatches the chart. The operative note decides the code with one fact: was a post placed in the canal.

The cast-versus-prefab axis is what carriers reprice on

Once a post is in the canal, the code depends on how it was made:

• D2952 is a cast (indirectly fabricated) post and core, custom-made as one piece, usually with a lab step.
• D2954 is a prefabricated post and core: a stock post seated in the canal, with the core packed around it chairside.

The two fill the same role under a crown, but they are not interchangeable. Some plans benefit them at different amounts, and carriers reprice when the code and the procedure disagree. A lab slip or a note describing the custom-cast pattern supports D2952; a note naming a stock post by manufacturer and size supports D2954. Billing the cast code for a chairside prefab post is a misrepresentation, not a billing preference.

The additional-post codes follow the same split. Each additional cast post on the same tooth is D2953, used with D2952. Each additional prefabricated post is D2957, used with D2954. Do not cross them.

Top billing problems with D2952

1. Cast-versus-prefab mismatch. D2952 billed for a prefabricated post, or the reverse. This is the classic post-and-core coding error and a clean reason to reprice or deny.
2. No root canal on file. If the tooth has no documented endodontic treatment, the carrier questions the post entirely. The root canal history needs to be on the claim or in the carrier’s records.
3. Bundled into the crown. Some plans treat the post and core as inclusive to the crown benefit. Plan-dependent; the patient often owes the post-and-core fee.
4. Post and buildup codes swapped. D2950 submitted when a post was placed, or D2952 submitted when only a buildup was done.

Documentation that supports the claim

The claim and the chart should carry:

• Evidence of the completed root canal on the tooth (date and code, or a radiograph showing the obturated canal).
• An operative note stating that a cast (indirectly fabricated) post and core was placed, distinguishing it from a prefabricated post.
• A post-treatment radiograph showing the post seated in the canal.
• The crown billed separately, ideally on the same claim, so the carrier reviews the unit together.

In the patient record, document the canal treated, the fabrication method, the number of posts if more than one, and the planned crown.

Example case

An established patient has tooth #8 with a completed root canal and extensive coronal breakdown. A prefabricated post will not seat well in the wide, tapered canal, so the dentist takes an impression for a custom cast post and core, which the lab fabricates. The dentist cements it and prepares the tooth for a crown.

Billing steps:

1. Confirm the canal is treated and the post is custom-cast, not a stock prefab post. That makes the code D2952, not D2954.
2. Code D2952 with a note describing the custom cast fabrication and the treated canal.
3. Bill the crown (for example D2740) separately, on the same claim where the plan allows.
4. Attach the post-treatment radiograph and the endodontic history.
5. Read the EOB. If the post and core bundles into the crown, that is plan language; post the payment and handle the balance per the plan. If it denies for a missing root canal, supply the endodontic documentation.