Simon Laurence Stevens, Baron Stevens of Birmingham, is a British public policy adviser, former CEO, and independent member of the UK House of Lords. He served as the eighth Chief Executive of the National Health Service in England from 2014 to 2021.

He first joined the NHS in 1988, and worked at the Department of Health and 10 Downing Street, as well as internationally, including in Guyana, Malawi, and in the United States. A former member of the Labour Party, Stevens was a councillor in the London Borough of Lambeth from 1998 to 2002. Stevens served as a senior executive at the UnitedHealth Group from 2004 to 2014, an American for-profit managed health care company which offers health care products and insurance services. He was also a Visiting Professor at the London School of Economics from 2004 to 2008.