On May 15th, 2013 a national call-in was convened to promote Rep. John Conyers' bill H.R. 676, that would establish a non-profit, universal, single-payer health care program, an improved "Medicare for All" act.
- Quentin Young, M.D. - Single Payer Activist
- Thom Hartmann - National TV and Radio Host / Best-Selling Author
- Jean Ross - National Nurses United (NNU)
- Mark Dudzic - Labor Campaign For Single Payer
- Robert Score - IATSE-Local 1
- Willie Adams - International Longshore and Warehouse Union
- Kay Tillow - All Unions Committee for Single Payer Health Care--HR 676
- Tim Carpenter - Progressive Democrats of America
- Mimi Kennedy, Chair, Progressive Democrats of America
- Donna Smith - Chair, Healthcare not Warfare Campaign
- Benjamin Day - Healthcare NOW!
- Ture Turnbull - MassCare
- Maria Svart - Democratic Socialists of America