In 2006, she started the organization Canadian Doctors for Medicare. She won the Canadian Medical Association award for young Leaders. In 2013, the Toronto Star called her one of 13 people to watch.

Dr. Martin completed her bachelor's degree in science from McGill University and her M.D. at the University of Western Ontario. She also holds a master's degree in public policy from the School of Public Policy & Governance at the University of Toronto. Currently, she is the vice President, medical affairs and health system solutions at Women's College Hospital (WCH), and the founder of the WCH Institute for Health System Solutions and Virtual Care (WIHV). She is also a family physician in the Family Practice Health Centre at WCH, an associate professor in the Departments of Family and Community Medicine and Health Policy, Management and Evaluation and School of Public Policy and Governance at the University of Toronto. In 2016, she was awarded the CIHR-IHSPR Article of the Year Award for her work on the Estimated cost of universal public coverage of prescription drugs in Canada.

Dr. Martin is the author of the book "Better Now: Six Big Ideas to Improve Health Care for All Canadians", Penguin Canada, 2017.