He is an academic general internist and clinician-investigator focused on precision medicine applied to the prevention and treatment of obesity, diabetes, and their complications, particularly cardiovascular disease. 

He uses precision medicine broadly to mean:

1. Defining and understanding subgroups and heterogeneity in the diverse population of individuals with cardiometabolic disease.

2. Evaluating the implications of those subgroups/heterogeneity for diabetes prevention and management.

3. Determining how well subgroups with different cardiometabolic disease characteristics or treatment response defined in one study population generalize to other study populations.