Which block would you reference in order to point to the diagnosis code in Block 21?

To accurately reference the diagnosis code in Block 21 of the CMS-1500 form, you would look at Block 24E. This block is designated for the corresponding diagnosis code(s) that relate to the procedure or service reported in Block 24D. Each procedure or service requires a reference to a diagnosis code in Block 21, ensuring that the payers understand the medical necessity of the services rendered.

The clarity between these blocks aids in proper claims processing and helps prevent delays or denials. Block 24D explains the procedure performed, while Block 24E connects it to the appropriate diagnosis from Block 21, demonstrating the link between the medical condition and the provided service.