Frustration from senior doctors about the Government's ongoing pay freeze for high-income public sector workers.
Members of the Association of Salaried Medical Specialists will begin stopwork meetings today, to discuss their pay and working conditions.
It comes as nurses prepare for strike action this month after rejecting their latest pay offer.
Executive Director Sarah Dalton told Kate Hawkesby the Government pay freeze can't be justified, when the economy is doing so well.
"It's about giving lowest paid workers the biggest increases and we absolutely support that, but we think that you raise the floor for those at the bottom by actually raising the floor, not by pushing the ceiling down."
Dalton says members will accept a pay rise below inflation, but they're being offered zero-percent instead.