Final answer:
The level of HPI performed in this case is 99212, indicating a problem-focused history with limited information.
Step-by-step explanation:
The level of HPI (History of Present Illness) that has been performed in this case is C. 99212. A level 99212 is appropriate when there is a problem-focused history, which involves obtaining a limited history of present illness, a limited review of systems, and a limited past medical, family, and social history.
In this scenario, the patient arrived with complaints of lower abdominal pain that started 4 days ago following a long trip in an automobile. The history taken indicated the duration and onset of the pain, which provides enough information to make a preliminary assessment of the problem. However, the history does not include a review of systems or a detailed past medical, family, and social history, indicating a limited history.
Therefore, based on the information provided, the appropriate level of HPI in this case would be 99212.