Which block should be left blank according to the provided guidelines?

• A. Block 9 B
• B. Block 9 C
• C. Block 11
• D. Block 11 D

Answer: (A)

The correct choice is Block 9 B, which should be left blank according to the provided guidelines. In the context of the CMS-1500 form, Block 9 is specifically designed to gather information about the patient’s relationship to the insured, and Block 9 B is reserved for designating if the patient's care is for a secondary insurance or if there is no secondary insurance to report.

Leaving Block 9 B blank indicates that the form is not being submitted for a secondary claim or that there is no applicable information for this section, which aligns with the requirement to ensure clarity and accuracy in the claim submission process. This preparation helps prevent unnecessary delays or rejections in claim processing, as the insurance company can more easily interpret the information presented.

In contrast, other blocks such as Block 11 and Block 9 C contain important information relevant to the claim that should be thoroughly completed to facilitate the proper processing of the healthcare services provided.