Which of the following codes should a coder assign for a diagnosis of type 2 diabetes without complications?

The correct code for a diagnosis of type 2 diabetes without complications is E11.9. This code specifically indicates a diagnosis of type 2 diabetes mellitus when there are no stated complications associated with the condition. When coding for diabetes, it is essential to differentiate between the type of diabetes and the presence of any complications.

E11.9 is utilized when the patient does not have any significant complications related to diabetes, which aligns perfectly with the provided diagnosis. This makes it essential for accurate coding, as it directly reflects the patient's health status, ensuring proper billing and appropriate care management.

The other codes represent different situations. For instance, E11.649 includes type 2 diabetes with a specific complication (unspecified), whereas E10.11 refers to type 1 diabetes with ketoacidosis. E24.1 deals with a different condition, specifically Cushing's disease. Therefore, selecting E11.9 ensures that the coding is precise, indicating exactly what the diagnosis is without complications.