What does the term "unlisted code" refer to in the context of CPT?

The term "unlisted code" specifically refers to codes that are used for procedures or services that do not have a designated or specific Current Procedural Terminology (CPT) code. When a procedure is performed that is not adequately described by an existing CPT code, the unlisted code allows for its identification and billing. This is particularly important for unique, new, or less common medical procedures or services where the standard coding system does not provide a precise match.

Unlisted codes serve as a way to ensure that healthcare providers can still receive reimbursement for services rendered, even if those services fall outside the scope of the commonly accepted procedures covered by the CPT codes. This unique classification is crucial for accurate billing and record-keeping in medical practice.