Quartet is a healthcare services company that provides a platform for primary care physicians to coordinate care for their patients. The company was founded in 2014 and is headquartered in New York, New York. Quartet's platform allows physicians to identify patients with behavioral health conditions and connect them with appropriate care providers. The company also offers a suite of tools to help physicians manage their patient populations, including real-time analytics and patient performance metrics. Quartet has raised over $150 million in funding to date.