Final answer:
The term "uncontrolled" in coding for diabetes mellitus refers to the inability to manage and regulate blood sugar levels effectively.
Step-by-step explanation:
In the context of coding for diabetes mellitus, the term "uncontrolled" refers to the inability to manage and regulate blood sugar levels effectively. When someone has uncontrolled diabetes, their blood sugar levels remain consistently high, either due to insufficient insulin production or the body's cells not responding properly to insulin. This can lead to various complications and health issues in the long term.