This doesn't sound arrogant, it sounds wrong. Whether or not you're doing meaningful work, I'm certain that you and your team are not solely responsible for the quality of healthcare in America as this statement implies. I'm guessing what you meant is that you're producing meaningful results/drugs that genuinely help people and make a difference in the healthcare system.
I would most definitely change that sentence. Arrogance is being smug about your accomplishments, this is just an untrue statement.