A list of the unlisted procedures for use in a specific section of the CPT manual is contained in:

The correct answer is that the list of unlisted procedures for specific sections of the CPT manual is found in the Guidelines. Each section of the CPT codebook includes a set of guidelines that provide essential information on the usage, coding conventions, and specific requirements pertinent to that section. Among the information provided, these guidelines detail codes that are considered unlisted, which are necessary for reporting services not specifically described by other codes.

In contrast, Appendix A provides a list of modifiers, which are used to indicate that a service has been altered in some way but not changed in its definition or code. Appendix B includes a summary of changes made in the current edition of the CPT manual, highlighting what has been added, revised, or deleted. The Index is a tool for finding codes and descriptions based on keywords or phrases rather than providing guidance on unlisted procedures.