Which character 7 value is valid in Table 4B0?

In Table 4B0 of the ICD-10-PCS coding system, the character 7 represents the "Qualifying Value," which is used to indicate an additional attribute of the procedure being performed. Each character in the code has a specific range of valid values that relate to the type of procedure described.

The value 'Z' is valid in Table 4B0 as it is designed to denote a procedure where no additional qualifiers apply. It serves a unique purpose in coding, allowing coders to specify that the procedure does not require further clarification or distinction. This makes it an appropriate choice for character 7 in this table.

In contrast, the other characters such as 'X', 'Y', and 'W' do not correspond to valid values for this specific location within the coding structure of Table 4B0, as they may refer to other coding scenarios or might not exist within that specific table. Therefore, 'Z' is the correct selection for character 7 in Table 4B0, as it accurately aligns with the guideline for appropriate coding practices.