More than 800 hospital workers will be striking for an hour today over pay.
The Public Service Association says admin staff at the six South Island District Health Boards are unhappy at the lower pay they receive compared to their North Island counterparts.
But PSA spokesman Warick Jones is adamant it will not have any affect on patient care.
"They are the only occupational group employed by the DHBs that don't have national rates of pay and we think that is very unfair and needs to be addressed immediately."
Mr Jones says more action will take place next week but will not comment on what it will be.
RadioLIVE