Final answer:
When a code is listed next to a main term in the Alphabetic Index, it is known as a default code and is used as a placeholder or temporary code until a more specific code can be identified.
Step-by-step explanation:
A. True
When a code is listed next to a main term in the Alphabetic Index, it is known as a default code. This code is assigned when there is no specific code for the condition described by the main term. It is used as a placeholder or temporary code until a more specific code can be identified.
For example, in the Alphabetic Index of the ICD-10-CM coding system, if we look up the main term 'headache,' there may be multiple codes listed under it. However, if none of those codes specifically match the exact type of headache being described, a default code may be listed as a general code for headaches.