Final answer:
The correct birth date format on the CMS-1500 claim form is mm/dd/yyyy, which is essential to avoid processing errors or rejected claims.
Step-by-step explanation:
The correct format for entering a birth date on the CMS-1500 claim form is mm/dd/yyyy. Therefore, the right answer to the question is option 2: mm/dd/yyyy. When filling out the CMS-1500 form, it is crucial to follow the specified format because this standard ensures that the information is consistent and reduces the chances of errors in processing health insurance claims. Incorrect formats can lead to claims being rejected or delayed. Always double-check your entries for accuracy before submitting the form.