Dr. Syed Mohiuddin, Chief AI Transformation and Strategy Officer at UnitedHealth Group, joins Stanford's Matt Lungren and Justin Norden for this installment of the AI in Healthcare series to discuss how artificial intelligence is changing medical practice and the business of care. The conversation moves between two scales: AI tools built for individual patients, like symptom checkers and personalized health assistants, and the systems UnitedHealth is deploying across large care networks to manage cost and access. Mohiuddin draws on his position inside one of the largest US health insurers to describe where AI is already embedded in claims, diagnostics support, and clinician workflows, and where adoption is still slowed by regulation, trust, and data quality. Lungren and Norden push him on concrete tradeoffs, including who benefits when automation cuts costs and what happens to clinical judgment as these tools scale. The discussion stays grounded in specific use cases rather than general predictions about AI's future.