What information should be entered in Block 11 A?

Block 11 A of the CMS-1500 form is specifically designated for capturing the "Insured's birth date and gender." This information is crucial for accurately identifying the insured individual and for substantiating any claims processed by the insurance carrier. Including the insured's birth date helps distinguish between individuals with similar names and is essential for age-related coverage requirements or benefits. The gender information often plays a role in determining certain coverage parameters and statistical analyses for the insurer.

While the other options, such as capturing group health plan coverage, the insured's full name, or the employer's name, are all important and have their respective fields on the CMS-1500 form, Block 11 A is explicitly focused on the birth date and gender of the insured. Accurate data entry in this block is essential to ensure that claims are processed smoothly and correctly.