Denture and partial codes, relines, repairs and the frequency clock

The code set here is among the most orderly in CDT: arch, then type, then material. What makes this family difficult is that nearly every decision a payer makes about a denture claim depends on history rather than on the appliance, and most of that history is recoverable at verification for the cost of two questions.

The grid: arch, then complete or partial, then material

• D5110 is a complete maxillary denture and D5120 the mandibular equivalent. Immediate complete dentures — delivered at the extraction appointment — have their own pair of codes.
• Partial dentures split first by arch, then by base material: resin base, cast metal framework with resin base, and flexible base each have distinct codes.
• Interim or transitional appliances, the ones a practice usually calls a flipper, are a separate pair again. They are not cheap versions of the definitive codes and should not be billed as such.
• Repairs, relines, rebases, adjustments and tissue conditioning all have their own codes. Which one applies is a clinical distinction with a large fee consequence, and it is worth settling before quoting the patient.

The five to seven year clock, and who it belongs to

Almost every plan limits replacement of a removable prosthesis to once in a period of five, six or seven years per arch. Two features of that rule cause most of the denials in this family.

• The clock runs from the last prosthesis the plan paid for, regardless of which practice made it. A patient who had a denture made elsewhere four years ago carries that date with them.
• It also commonly runs from a prosthesis the patient paid for privately, where the plan has a record of it.
• A lost or broken denture is not an exception in most contracts. Loss is specifically excluded by many plans, and breakage directs you to the repair codes rather than the replacement codes.
• An immediate denture and the conventional denture that replaces it are usually two placements against one limit, not a sequence the plan expects to fund twice.

Ask the patient when they last had a denture made and who paid for it, at verification, before the impression appointment. It is a thirty-second question that decides a four-figure claim.

The missing tooth clause

This is the second date that matters, and it is less familiar to teams than the frequency clock. Many plans exclude from the prosthesis benefit any tooth that was already missing when the patient's coverage began.

The consequences are specific rather than general. A partial replacing six teeth, four of which were extracted before the plan started, may be reduced proportionally or declined entirely depending on the wording. A patient who changed employers between the extractions and the prosthesis is the classic case, and the extraction dates are the evidence.

Adjustments, relines and rebases are three different claims

The distinction is worth drilling into the team, because the three sit at very different fees and the wrong one is usually the cheaper one.

1. An adjustment alters the existing appliance chairside. Adjustments within roughly six months of delivery are generally considered part of the denture fee and are not separately payable — which is a good reason to deliver well rather than to bill the follow-ups.
2. A reline resurfaces the tissue-bearing side of the existing base. Chairside and laboratory relines are separate codes, and plans commonly decline a reline within six months of initial placement on the reasoning that the fit was the practice's responsibility.
3. A rebase replaces the entire base material around the existing teeth. It is a larger procedure and a larger fee, and billing a reline when a rebase was done is a recurring quiet loss.
4. Tissue conditioning is a separate code again, is usually limited to a small number per arch per year, and is frequently bundled when billed on the same day as a reline.

The alternate benefit on partials

Where a cast metal framework partial is placed, a number of plans allow only the resin base equivalent and leave the difference with the patient. The pattern is the same alternate benefit clause that downgrades posterior composites, applied to a far larger fee.

It is not appealable and it is knowable in advance. Ask whether the plan downgrades cast partials during verification, and put the number in the written estimate rather than discovering it on the explanation of benefits.

What to attach

1. Extraction dates for the teeth being replaced, which answer the missing tooth clause before it is raised.
2. The date and arch of any previous prosthesis, which answers the frequency limit.
3. A radiograph where the claim involves a partial, so the abutment teeth and the edentulous spans are visible.
4. For a repair or reline, a note of the original delivery date, because the six-month rule is applied from it.