D2954 is the CDT code for a prefabricated post and core placed in addition to a crown — a manufactured post cemented into a root-canal-treated tooth's canal with a core built around it to retain a crown. It includes the canal preparation and the core material.
Informational only — confirm the official CDT descriptor and your payers' rules independently. This is general guidance, not billing, coding, or clinical advice.
When to Use the D2954 Code
Report D2954 when an endodontically treated tooth lacks enough coronal structure to retain a crown, so a prefabricated (store-bought) post is cemented into the prepared canal and a core is built around it as a foundation for the crown. The code includes preparing the canal and the core, and it is reported in addition to the separate crown code.
Distinguish it from related codes by what was placed. A cast post and core fabricated in a lab is D2952, not D2954. An additional prefabricated post in the same tooth (a second canal) is D2957. A core buildup without a canal post is D2950. Code by the actual post type and number: a single prefabricated post-and-core on a treated tooth is D2954.
Documentation & Clinical Scenarios
Post-and-core claims hinge on showing the tooth was root-canal treated and needed the post for retention:
- Tooth number and confirmation the tooth has had endodontic therapy (root canal completed).
- The reason a post is needed — insufficient remaining coronal structure to retain the planned crown.
- A post-endodontic radiograph showing the completed root canal and, ideally, the seated post.
- A note that a single prefabricated post was used (and the canal in which it was placed), since additional posts use a different code.
The crown is a separate procedure with its own code and documentation. The canal preparation and the core are included in D2954 and are not billed separately.
Insurance & Billing Tips
- Confirm the tooth is endodontically treated. Most plans only pay a post and core on a tooth with a completed root canal; the RCT date or evidence is commonly requested.
- Don't double-bill a buildup. D2954 includes the core, so don't also report D2950 on the same tooth for the same buildup.
- Code by post type. A cast post and core (D2952) and an additional prefabricated post (D2957) are different codes with different allowances.
- Check frequency and same-tooth rules. Plans tie the post and core to the crown on the same tooth and may bundle or limit it.
- Attach a radiograph. A post-endodontic film supporting the need for the post speeds adjudication.
Example Case
A patient completes a root canal on a front tooth that had lost most of its crown to decay. To retain the new crown, the dentist cements a prefabricated post into the canal and builds a core around it, then preps the tooth for the crown. The office reports the post and core as D2954 with the tooth number, evidence of the completed root canal, and a radiograph showing the seated post — and bills the crown separately under its own code. Because the endodontic treatment and retention need were documented, both claims are paid as expected.
Patients call about "the post before my crown" — not D2954. DentalReception AI answers and books those calls 24/7, captures insurance details, and routes clinical/billing questions to your team. See crown calls and root canal calls, or book a demo.
Frequently Asked Questions
What's the difference between D2954 and a core buildup (D2950)?
D2954 is a prefabricated post and core placed in the canal of an endodontically treated tooth, and it includes the canal preparation and the core. D2950 is a core buildup that rebuilds coronal structure without a post in the canal. If a post is cemented into a root-canal-treated canal, bill D2954 — and don't also report D2950 for the same buildup, since the core is already included in D2954.
What's the difference between D2954 and D2952?
Material and fabrication. D2954 is a prefabricated (manufactured, store-bought) post and core placed chairside. D2952 is a cast post and core, custom-fabricated in a lab. They retain a crown the same way but are different procedures with different codes and allowances, so report the one that matches what was actually placed.
Does insurance require the tooth to have a root canal first?
Almost always. A post and core is only appropriate on an endodontically treated tooth, and most plans require evidence the root canal was completed before paying D2954. Payers commonly request the RCT date or a post-endodontic radiograph. Confirm the tooth has completed endodontic therapy and keep the supporting film in the chart before billing.
Should I pre-authorize the post and core?
Because the post and core is tied to the crown and to the endodontic history, a pre-estimate helps confirm coverage and avoid bundling surprises. Submit it with proof of the completed root canal and a radiograph. Verifying the post-and-core and crown benefits together before treatment lets you give the patient one accurate estimate for the full restorative sequence.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.