The CDT Code Zirconia Bridge Claims Need, Unit by Unit

Anyone hunting for the CDT code zirconia bridge cases require will not find one, because the code set describes components and materials, never products. Zirconia is a ceramic, so it lands in the porcelain and ceramic family. A three unit zirconia bridge on natural teeth is D6740 for each retainer crown and D6245 for the pontic, three lines, each carrying its own tooth number. Change the material and the codes change. Change what holds the bridge up, implants instead of teeth, and the whole code family changes.

The codes take ninety seconds to look up. What costs practices money is everything sitting around them.

Zirconia has no code of its own, and never has

The Code on Dental Procedures and Nomenclature sorts fixed prosthetics by component, retainer or pontic, and by material class: resin, porcelain or ceramic, porcelain fused to a named alloy, or full cast in a named alloy. There is no entry for zirconia, none for lithium disilicate, none for any lab's brand name.

So a monolithic zirconia retainer, a zirconia framework with layered porcelain and a pressed ceramic retainer all report as D6740 and usually draw the same allowable. If a payer asks what the restoration was made of, the lab invoice answers, which is why it belongs with the claim.

A three unit zirconia bridge, line by line

Teeth 4 and 6 are the abutments, tooth 5 is missing, and the zirconia bridge seats today.

Three lines for three units, not one line with a quantity of three. Every unit is priced separately, so collapsing the span is the fastest way to be paid for one unit. A four unit bridge replacing two teeth gets two D6245 lines.

The money, using illustrative numbers rather than any real fee schedule:

That assumes the full annual maximum is available. With 600 dollars of maximum left, ordinary by autumn, patient responsibility becomes 2,200 and not one code changes.

What is CDT code D6245?

D6245 is pontic, porcelain/ceramic. The pontic is the suspended replacement tooth, and the code describes what it is made of, not what holds it up. There is no separate implant pontic code.

Here is the whole span in one crosswalk, pontic and retainer side by side.

D6253 is the interim pontic. Interim units are denied as included in the definitive restoration often enough to price as patient responsibility unless a plan says otherwise.

What is dental code 6740?

D6740 is retainer crown, porcelain/ceramic, the right hand column above. Recent CDT editions spell the D6700 series as retainer crown rather than crown, settling a long standing ambiguity: these codes exist only inside a fixed partial denture.

The trap is D2740, crown, porcelain/ceramic. Same material, same lab process, wrong code on a bridge, because D2740 is a standalone crown on one tooth. Put it on a span and the claim rejects or pays as a single crown, leaving roughly two thirds of a three unit benefit behind. The interim retainer is D6793, not D2799.

Implant supported spans are a different family: D6068 where a separate abutment was placed, D6075 where the restoration seats directly on the implant. The pontic stays D6245.

CDT codes for a Maryland bridge

A resin bonded fixed prosthesis has dedicated retainer codes and borrows the standard pontic codes.

A zirconia Maryland bridge replacing one anterior tooth is three lines: D6548, D6245, D6548. Some plans treat a resin bonded prosthesis as an interim measure rather than a definitive one, so send it for predetermination before the teeth are prepared. Our guide to getting a predetermination for dental veneers approved covers how to assemble one that gets a real answer.

What is CDT code D2952 used for?

D2952 is post and core in addition to crown, indirectly fabricated, made as one custom unit after canal preparation. The operative words are in addition to crown. On a bridge abutment, the D2000 family is wrong.

Each additional post in the same tooth has its own code, D2953 indirectly fabricated and D2957 prefabricated. Buildups on prosthetic abutments are heavily reviewed: plans commonly want a preoperative radiograph showing how much tooth structure is missing, and some fold the buildup into the retainer allowance. That is an employer group choice rather than a carrier rule, so verify it on the specific plan.

What is CDT code D0367?

D0367 is cone beam CT capture and interpretation with a field of view of both jaws, with or without cranium, the largest of the routine volumes.

On a three unit tooth supported bridge, D0367 is almost never the right study. Periapicals of the abutment teeth carry the documentation, and a both jaws scan invites a reviewer to ask why. D0364 through D0368 include interpretation, while the D0380 series is capture only, and mixing the two is a common rejection.

Where the indication is medical, such as joint imaging, the scan may belong on a medical claim with a CPT code and an ICD-10-CM diagnosis. Our explainer on the differences between CDT and CPT codes in dentistry sets out the boundary, and medical billing for TMJ treatments in a dental office works a case end to end.

Sectioning, re-cementing and repairing a bridge

These surface years later, usually at an emergency visit, and they are miscoded constantly.

D9120, fixed partial denture sectioning. Separation of one or more connections between abutments or pontics when it is not done in connection with an extraction or surgical procedure, including recontouring the retained portions.

D6930, re-cement or re-bond fixed partial denture. The code for a bridge that came off intact. D2920 is re-cement or re-bond crown and belongs to single units only, and implant supported prosthetics use D6092 and D6093. Many plans deny a re-cement done within a set window of the seat date, commonly six or twelve months, as included in the original restoration.

D6980, fixed partial denture repair necessitated by restorative material failure. Chipped ceramic or a fractured connector repaired in place.

There is no CDT code for removing an intact cemented bridge. Sectioning is what gets reported, and anything beyond falls to an unspecified by report code with a narrative attached. By report codes never pay on the code alone, the pattern behind most of the denials in our breakdown of why dental bone graft claims get denied.

After the codes are right, the plan still decides

A clean claim is the entry ticket, not the outcome. Five provisions decide what a correctly coded zirconia bridge pays, and each is chosen by the employer group, so verify them per patient rather than assuming them from the carrier name.

1. The missing tooth clause. If tooth 5 was lost before the effective date, the pontic may be excluded while the retainers still pay.
2. The alternate benefit provision. Some plans allow a fixed bridge at the rate of a cast removable partial, D5213 maxillary or D5214 mandibular.
3. The replacement interval. Commonly five years, sometimes seven or eight, measured from a prior seat date that may sit with a previous practice.
4. Waiting periods on major services. Frequently six to twelve months from the effective date.
5. The annual maximum. Commonly quoted between 1,000 and 2,000 dollars, which one three unit case exhausts.

One more question decides more year end claims than any of those: whether the plan uses the preparation date or the seat date as the date of service. On a case straddling a plan year or a termination, the answer moves the whole claim. Ask during verification, record it with the reference number.

When a claim pays short, the adjustment codes on the remittance name the provision that was applied, and reading them precisely is the difference between a resubmission and a write off. Our guide to CARC, RARC and CAGC codes for dental teams decodes the ones that land on prosthetic lines. Curo reads those provisions during verification and prices each unit of the span before the tooth is prepped, and its claims automation compares the remittance against the estimate, line by line.

Build the claim before you build the bridge

Before the prep appointment, write the claim as it will be submitted: one line per unit, a tooth number on each, material class confirmed against what the lab will deliver, buildup codes from the D6900 range rather than the D2900 range, and radiographs chosen to match the case rather than to look thorough.

That takes five minutes at a point when five minutes exist. Doing it after the seat, with a patient asking why the estimate moved, takes longer.