Your Health.
Our Mission.

Dr. Kareem Moasis is a Medicine Specialist with advanced specialty training in Internal Medicine, Addiction Medicine, Longevity Medicine, and Behavioral Health. He is the founder and lead physician of Oasis Medical Group — and the reason patients drive from across North County San Diego to receive care in Vista.

Dr. Moasis completed his medical training with a focus on comprehensive, relationship-based internal medicine. He was drawn to internal medicine because of its breadth — the ability to care for the whole patient across every system of the body — and to addiction medicine because of the profound impact that effective treatment can have on a patient's entire life trajectory.

What sets Dr. Moasis apart is not just his clinical knowledge — it is his approach. He practices medicine the way it was meant to be practiced. He sits down. He listens. He asks the questions that other doctors skip. He explains things in plain language. And when you leave his office, you leave with a plan you understand and a physician you can trust.