CDT Code D9973: External Bleaching — Per Tooth

Reviewed by Dr. Morgan Heminger · Updated July 12, 2026

What Is D9973? (CDT Code Overview)

CDT code D9973 (External Bleaching — Per Tooth) is officially defined in the CDT as “external bleaching - per tooth.” It belongs to the Adjunctive General Services category of CDT codes (Other Adjunctive Services subcategory).

When Should You Use D9973?

The D9973 dental code applies to external tooth bleaching treatments, billed per arch. This CDT code is appropriate when patients choose professional teeth whitening for aesthetic purposes, with bleaching agents applied to the outer enamel surface. D9973 does not cover internal bleaching for non-vital teeth or take-home whitening kits sold by the practice. This code should only be used for professional-grade treatments performed or overseen by licensed dental practitioners.

Quick reference: Use D9973 when the clinical scenario specifically matches external bleaching procedures. Do not use this code as a substitute for related procedures in the same category. Consider whether D9910 (Desensitizing Medicament Application) or D9911 (Desensitizing Resin Application) might be more appropriate instead.

D9973 vs. Similar CDT Codes: Key Differences

Dental teams frequently confuse D9973 with other codes in the other adjunctive services range. Here is how D9973 differs from the most commonly mixed-up codes:

Documentation Requirements for D9973

Proper documentation ensures correct billing and regulatory compliance. When applying D9973, your patient records should contain:

• Comprehensive clinical notes recording the patient's starting tooth shade and treatment goals

• Specific bleaching product and concentration utilized

• Documentation of treated arches (upper, lower, or both)

• Signed patient consent for elective treatment

• Before and after treatment images (when available)

Typical clinical situations for D9973 involve patients wanting cosmetic enhancement for important events like weddings or professional opportunities, or individuals concerned about tooth staining from aging, dietary habits, or medications. Always emphasize that this represents an optional, aesthetic procedure, which affects insurance reimbursement eligibility.

Documentation checklist for D9973:

• Patient chief complaint and relevant medical/dental history clearly recorded.

• Clinical findings that support the use of D9973 specifically (not a more general or more specific code).

• Any diagnostic tests, imaging, or supplementary data that justify the procedure.

• Treatment plan with rationale connecting the diagnosis to the procedure coded as D9973.

• Post-procedure notes, including outcomes and follow-up recommendations.

For a deeper look at documentation best practices, see our guide on How Clinical Documentation Quality Drives Dental Claim Approvals.

Insurance and Billing Guide for D9973

The majority of dental insurance policies exclude coverage for external bleaching treatments coded as D9973, classifying them as cosmetic procedures. Nevertheless, verifying individual patient benefits before treatment remains essential. Follow these practical billing guidelines for D9973:

• Benefit Verification: Contact the patient's insurance provider or access their online system to determine if cosmetic coverage exists.

• Treatment Estimates: File a pre-authorization request to receive official coverage determination, improving patient understanding and treatment acceptance.

• Patient Education: Discuss expected costs clearly and secure written financial consent before beginning treatment.

• Claims Processing: When filing claims, apply D9973 with complete supporting records, even when reimbursement seems unlikely. This maintains proper documentation for practice and patient records.

• EOB Management: Process Explanation of Benefits statements quickly. File any coverage denials for future reference and patient discussions.

Common denial reasons for D9973: Lack of clinical documentation, frequency limitations exceeded, code mismatch with diagnosis, or missing prior authorization. When appealing a denied D9973 claim, include a detailed narrative explaining why the procedure was necessary, supporting clinical evidence, and relevant imaging or test results. Many practices find that well-documented first submissions dramatically reduce the need for appeals.

To improve your overall claims workflow, explore How to Build Patient Trust with Better Dental Insurance Transparency.

Real-World Case Example: Billing D9973

A patient presents requiring a procedure consistent with D9973 (external bleaching procedures). The treating dentist documents the clinical findings, performs the procedure as indicated, and records detailed notes including the diagnosis, technique, and outcome. The billing team verifies insurance coverage, submits the claim with D9973 and supporting documentation, and follows up to ensure timely reimbursement. When the initial claim is processed, the practice reviews the Explanation of Benefits and addresses any discrepancies promptly.

Related CDT Codes to D9973

If you are researching D9973, you may also need to reference these related CDT codes in the other adjunctive services range and beyond:

• D9110: Emergency Pain Treatment — Learn when to use D9110 and how it differs from D9973.

• D9120: Fixed Partial Denture Sectioning — Learn when to use D9120 and how it differs from D9973.

• D9210: Local Anesthesia for Non-Operative Procedures — Learn when to use D9210 and how it differs from D9973.

• D9211: Regional Block Anesthesia — Learn when to use D9211 and how it differs from D9973.

• D9310: Professional Consultation — Learn when to use D9310 and how it differs from D9973.

Frequently Asked Questions About D9973

Is D9973 suitable for touch-up treatments or additional bleaching sessions?

D9973 can indeed be utilized for touch-up appointments or subsequent external bleaching treatments, provided that each session receives proper documentation and is billed on a per-tooth basis. Every treatment instance must include comprehensive clinical documentation, current shade records, and updated patient consent forms. It's important to confirm with patients and their insurance providers regarding any available benefits or restrictions that may apply to repeated bleaching procedures.

What patient conditions or factors would make D9973 inappropriate for use?

Several patient conditions may make external bleaching inadvisable, including pregnancy, nursing mothers, significant enamel deterioration, extreme tooth sensitivity, or active dental caries that remain untreated. Dental practitioners must conduct comprehensive patient assessments to confirm candidacy for external bleaching treatments prior to implementing D9973 procedures. Always verify with the specific insurance carrier, as policies and coverage rules can vary significantly between payers. Maintaining thorough documentation for D9973 will strengthen your position in any audit or appeal scenario.

What approach should dental practices take when patients express dissatisfaction with D9973 bleaching outcomes?

When patients express concerns about their bleaching results, dental practices should carefully examine the initial shade records, engage in thorough discussions about achievable outcomes, and reference the patient's signed consent documentation. Any follow-up treatments must receive proper documentation and appropriate billing codes. Establishing clear communication protocols both before and following treatment helps set appropriate patient expectations and minimizes potential conflicts.

What is the typical reimbursement range for D9973?

Reimbursement for D9973 (external bleaching procedures) varies based on geographic location, payer contract terms, and whether the patient has in-network or out-of-network coverage. Fee schedules are typically set by individual insurance carriers, so practices should verify expected reimbursement during benefits verification. If your practice consistently receives lower-than-expected payments for D9973, consider renegotiating your fee schedule with major payers or reviewing your UCR (Usual, Customary, and Reasonable) data for your region.

Does D9973 require prior authorization?

Prior authorization requirements for D9973 depend on the patient's specific insurance plan. Some carriers require advance approval for procedures coded under D9973, while others process claims without it. Best practice is to verify authorization requirements during insurance eligibility checks before the appointment. If prior authorization is required, submit the request with detailed clinical notes and supporting documentation to avoid delays in patient care and claim processing.