D5511 is the CDT code for repairing a broken complete (full) lower denture base — bonding a cracked or fractured mandibular denture back together so the patient can keep using their existing prosthesis. It addresses the base material itself, not the artificial teeth.
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 D5511 Code
Report D5511 when a patient's complete mandibular denture base is cracked or fractured — commonly from a drop, an accident, or fatigue over time — and the base is repaired rather than remade. The repair restores the integrity of the lower denture base.
Pick the code by arch and base type: D5511 is the complete mandibular base repair; D5512 is the complete maxillary base repair; D5611/D5612 repair a partial denture's resin base (lower/upper); and D5520 is for replacing missing or broken denture teeth. This split is important — D5510 was retired in the 2018 CDT update and replaced by the arch-specific codes D5511 and D5512, so always report the arch.
Documentation & Clinical Scenarios
A repair is a small procedure, but clear notes support the claim and any review:
- Arch and prosthesis — note this is a complete mandibular denture.
- The fracture — location and type of break in the base, and how it occurred if known.
- What was done — the repair performed and the result.
- Before/after photos where practical, especially for a significant fracture.
If denture teeth were also replaced, that's a separate procedure (D5520) with its own code; report it in addition to the base repair when both are done.
Insurance & Billing Tips
- Verify the repair benefit. Confirm the plan covers denture-base repairs and the patient's share.
- Watch frequency limits. Some plans limit how often a repair is payable (for example, once in a period) and may scrutinize repeat repairs on the same denture.
- Report the correct arch. Use D5511 for the lower complete denture; using a retired or wrong-arch code invites denials.
- Don't bundle separate work. If teeth were replaced (D5520) or a reline was done, report those separately rather than rolling them into the repair.
- Consider replacement economics. Repeated repairs on an old denture may signal it's time for a remake; document the condition either way.
Example Case
A patient drops their complete lower denture on a tile floor and the base cracks across the midline. The teeth are intact. The dentist bonds and reinforces the fractured base chairside or sends it to the lab for repair, with no teeth replaced. The visit is coded D5511 with a note describing the midline base fracture and the repair, plus a photo of the break. Because the plan covers denture-base repairs and the documentation is clear, the claim is filed for the mandibular complete-denture base repair without issue.
Patients call about "my denture cracked" or "my lower plate broke" — not D5511. DentalReception AI answers those calls 24/7, captures the urgency, and books the repair visit live into your schedule, while clinical and coverage questions route to your team. See how it handles denture calls, or book a demo.
Frequently Asked Questions
What's the difference between D5511 and D5512?
Arch. D5511 repairs a broken mandibular (lower) complete denture base, while D5512 repairs a maxillary (upper) complete denture base. Both replaced the older single code D5510 in the 2018 CDT update, so the arch-specific code must be reported. Choosing the wrong arch is a common cause of repair-claim denials.
What's included in a D5511 repair, and what isn't?
D5511 covers repairing the broken base of a complete lower denture. It does not include replacing broken or missing denture teeth (D5520), relining the denture, or rebasing it — those are separate procedures with their own codes. When teeth are also replaced during the same visit, report that procedure in addition to the base repair.
How often will insurance cover a denture repair?
It varies by plan. Many payers cover occasional repairs but apply frequency limits and may question repeated repairs on the same denture, since frequent breaks can indicate the prosthesis should be remade. Verify the repair benefit and any frequency limit before billing, and document the fracture clearly.
Do I need a pre-authorization for D5511?
A pre-authorization usually isn't required for a straightforward base repair, but a quick benefit check confirms coverage and any frequency limit. Documenting the fracture location and cause — ideally with a photo — and reporting the correct mandibular code supports the claim if the payer reviews it.
Confirm the current CDT descriptor and your specific payer policies before billing — browse the full dental code library or see our insurance verification feature.