What does Block 3 require regarding the patient's name?

Block 3 of the CMS-1500 form requires the patient's full name, which includes the last name, first name, and middle initial if available. Providing the full name is crucial for accurately identifying the patient and ensuring that the claim is processed without any confusion. This helps to match the provided information with the patient's records in the insurance company's database, reducing the likelihood of errors related to identity or medical history.

While it may seem that including only the last name or even just the last name and first name could suffice, these options can lead to ambiguity, especially if there are multiple patients with the same last name. Including the middle initial can further distinguish one patient from another, ensuring that claims are properly adjudicated.