How should the dates of service be listed in Block 24A?

The appropriate way to list the dates of service in Block 24A of the CMS-1500 form is to include both the 'from' and 'to' dates. This ensures that the insurance company understands the duration of the services provided to the patient. Providing both dates aids in the clarification and substantiation of the treatment periods, allowing for accurate processing of the claim.

Using only a start date or end date would not accurately represent the full span of services rendered, which could lead to confusion or delays in processing the claim. Stating just the service date for billing would similarly lack the necessary context that both dates provide. Therefore, including both the start and end dates in Block 24A is essential for thorough and clear documentation of the treatment timeline.