What types of codes contain a full description in CPT?

Stand-alone codes in the CPT coding system are defined by their capability to provide a complete and specific description of a medical procedure or service. Unlike other types of codes that may require additional information or refer to other codes for clarity, stand-alone codes are fully detailed within their own description.

For example, a stand-alone code will include not only the procedure or service it represents but also any relevant details necessary for understanding the context of that code. This is important for accurate billing, reporting, and understanding the medical services that have been rendered.

In contrast, unlisted codes do not have a specific description; they are used when no other code accurately describes a service. Indented codes typically represent variations of a main code and are listed under the main code, often providing less detail by design, relying on the description of the main code for context. Category III codes are used for emerging technology, services, and procedures but also may not have as exhaustive a description as stand-alone codes.

Therefore, stand-alone codes are distinguished by their comprehensive descriptions, making them the correct answer in this context.