How are CPT modifiers documented?

CPT modifiers are documented in the CPT appendix A, which serves as a vital resource for understanding how these modifiers function and applying them correctly in medical billing and coding. The appendix provides a comprehensive list of all currently accepted modifiers, offering clear descriptions for each modifier's purpose and usage. This ensures that medical professionals and coders can accurately convey additional information about the performed procedure, clarify its nuances, or indicate specific circumstances that might influence billing.

While procedure reports, medical history, and patient chart notes are important for documenting the patient's overall care and procedure details, they do not inherently serve as a systematic reference for understanding or looking up modifiers. Therefore, while these documents may contain information about the procedures performed, they do not specifically focus on the guidelines or definitions found in the CPT appendix A.