Is the D2664 code covered by insurance?

Coverage depends on the patient's insurance plan. It's important to verify benefits and any material-specific limitations.

How long does a resin-based composite onlay last?

With proper care, resin-based composite onlays can last 5-10 years or longer, though this can vary based on factors like oral hygiene and bite forces.

Can D2664 be used for primary teeth?

While technically possible, onlays are more commonly used for permanent teeth due to the cost and longevity considerations.

What are the advantages of using resin-based composite for onlays?

Resin-based composites offer aesthetic benefits, as they can be color-matched to the patient's natural teeth, and they bond well to the tooth structure.

D2664

Onlay Resin-Based Composite - CDT Code Guide

Restorative/Inlay/Onlay Restorations

Overview

The CDT code D2664 refers to the placement of an onlay made from resin-based composite material, covering four or more surfaces of a tooth. This procedure is typically used when a tooth is too damaged for a filling but not damaged enough to require a full crown. It involves the removal of decayed or damaged tooth structure, followed by the fabrication and placement of a custom onlay that restores the tooth's function and appearance. This code is particularly relevant in cases where aesthetics are a concern, as resin-based composites can be matched to the natural color of the patient's teeth.

When to Use This Code

When a tooth has extensive decay involving four or more surfaces but does not require a full crown.
In cases where a patient desires a more aesthetic restoration that matches the natural tooth color.
When a previous filling has failed and a more durable restoration is needed.
For teeth that have been fractured and require substantial restoration.
In situations where preserving as much natural tooth structure as possible is a priority.

Documentation Requirements

Detailed clinical notes describing the extent of decay or damage.
Pre-operative and post-operative radiographs showing the condition of the tooth.
Documentation of the patient's consent for the procedure.
Material used and shade selected for the onlay.
Detailed description of the procedure performed, including surfaces involved.

Billing Considerations

Ensure the procedure is not billed more frequently than allowed by the patient's insurance plan. Common modifiers may include those indicating the quadrant or arch. Verify coverage for resin-based materials, as some plans may have limitations or require pre-authorization.

Related CDT Codes

D2394 D2740 D2950 D2710 D2335

Frequently Asked Questions

An onlay covers one or more cusps of a tooth, while a crown covers the entire tooth. Onlays are used when less tooth structure needs to be replaced.

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