Understanding Dental Code D2140

When to Use D2140 dental code

The D2140 dental code is designated for an "amalgam – one surface, primary or permanent" restoration. This CDT code is used when a dentist places a silver amalgam filling on a single surface of either a primary (baby) or permanent (adult) tooth. It is important to select D2140 only when the restoration involves one surface and does not extend to additional surfaces, which would require a different code such as D2150 for two surfaces. Correct code selection ensures accurate billing and compliance with insurance requirements.

Documentation and Clinical Scenarios

Accurate documentation is essential for successful claim submission and reimbursement. When using D2140, dental teams should clearly record:

• The specific tooth number and surface restored
• The clinical reason for the restoration (e.g., caries, fracture)
• Pre-operative and post-operative clinical notes, including radiographs if taken
• Materials used (amalgam) and anesthesia administered, if applicable

Common clinical scenarios for D2140 include treating a small carious lesion or repairing a minor fracture on a single surface of a molar or premolar. Ensure that the documentation supports the necessity and appropriateness of the procedure for audit purposes.

Insurance Billing Tips

To maximize reimbursement and minimize denials when billing D2140:

• Verify coverage: Check the patient’s plan for amalgam restoration benefits, frequency limitations, and whether composite alternatives are covered.
• Submit complete claims: Attach clear clinical notes, diagnostic images, and tooth charting to support the claim.
• Use accurate narratives: Briefly explain the clinical necessity in the claim narrative, especially if the restoration is on a tooth that previously had a filling.
• Track EOBs: Review Explanation of Benefits (EOBs) promptly to identify underpayments or denials and initiate appeals if necessary.
• Appeal denials: If a claim is denied, submit a detailed appeal with supporting documentation, referencing the CDT code and clinical rationale.

Following these steps helps dental offices maintain healthy accounts receivable (AR) and ensures timely reimbursement.

Example Case for D2140

Case: A 9-year-old patient presents with a small carious lesion on the occlusal surface of tooth #30. The dentist removes the decay and places a one-surface amalgam filling. The clinical notes document the diagnosis, procedure, and materials used, and a pre-operative bitewing radiograph is attached to the claim.

Billing process: The dental team verifies the patient’s insurance covers amalgam restorations and submits a claim using D2140, including the clinical narrative and radiograph. The claim is approved, and payment is received according to the plan’s fee schedule.

This example highlights the importance of precise documentation, insurance verification, and proper claim submission for successful billing of D2140.