Understanding Dental Code D9120

When to Use D9120 dental code

The D9120 dental code is designated for the sectioning of a fixed partial denture, commonly known as a bridge. This CDT code should be used when a dentist needs to cut and separate a fixed bridge, typically to facilitate the removal of part of the prosthesis or to address issues such as decay, failed abutments, or structural compromise of a portion of the bridge. It is not used for the removal of the entire bridge or for repairs that do not require sectioning. Proper use of D9120 ensures accurate reporting and reimbursement for the specific clinical service provided.

Documentation and Clinical Scenarios

Accurate documentation is crucial when billing for D9120. Dental offices should record the clinical rationale for sectioning the bridge, such as recurrent caries under an abutment, mobility of a supporting tooth, or a fractured pontic. The patient’s chart should include pre-operative radiographs, intraoral photographs if available, and a detailed narrative describing the need for sectioning. For example, if a patient presents with decay under one abutment of a three-unit bridge, and only that section needs to be removed, D9120 is the appropriate code. Always document the specific teeth involved, the extent of the sectioning, and any subsequent procedures planned or performed.

Insurance Billing Tips

When submitting a claim for D9120, include comprehensive clinical notes and supporting documentation to minimize the risk of denial. Attach pre- and post-operative radiographs, and provide a clear narrative explaining why sectioning was necessary instead of complete removal. Be aware that some payers may consider D9120 inclusive with other procedures, such as extractions or new prosthesis placement, so review payer policies and EOBs carefully. If a claim is denied, prepare for a claim appeal by gathering all clinical evidence and referencing the CDT code description. Successful dental offices often use a checklist to ensure all required documentation is included before claim submission.

Example Case for D9120

Consider a patient with a five-unit fixed bridge spanning teeth #3 to #7. The abutment on tooth #5 has become non-restorable due to advanced decay. The dentist decides to section the bridge between teeth #5 and #6, removing the compromised section while preserving the healthy portion. In this scenario, D9120 is billed for the sectioning procedure. The claim should include a narrative such as: "Sectioned five-unit fixed bridge at #5-#6 due to non-restorable decay on #5 abutment; pre- and post-op radiographs attached." This level of detail supports the claim and increases the likelihood of timely reimbursement.