Which of the following could lead to missing information on a claim?

Missing signatures or physician NPI numbers on a claim is a significant factor that can lead to incomplete or rejected claims. Both signatures and the National Provider Identifier (NPI) are critical components of a claim submission. The signature verifies that the services were authorized by the provider, and the NPI is necessary for identifying the provider who rendered the service. If either of these elements is missing, the claim cannot be processed properly by insurers, often resulting in denials or delays in payment.

In addition, other options include factors that may affect the claim's accuracy or prompt follow-up, but they do not directly result in missing information on the claim itself. For example, inaccurate medication dosages could lead to claim adjustments but would not necessarily create a lack of essential information on the claim form. Similarly, lack of patient follow-up communication does not directly impact the information present in the documentation. Errors in printing the claim form can cause complications but typically do not signify missing key elements required for a claim's processing like signatures and NPI numbers do.