Machine Learning for Health (ML4H) is a longstanding venue for research into machine learning for health, including both theoretical works and applied works. In response to the growing community, for the first time in 2021, ML4H will be a separate symposium, rather than a NeurIPS workshop. This event represents a continuation of prior ML4H workshops and will continue to be held in December shortly before NeurIPS. This will allow us to expand the reviewing timeline and introduce a formal author response and reviewer discussion period, which we hope will improve the reviewing experience.