The board confirms University hospitals Hairmyres, Monklands and Wishaw are all at maximum capacity.
NHS Lanarkshire has warned its three hospitals are operating "beyond critical occupancy levels" due to staff and bed shortages.
"The safety of our patients and staff is our top priority and we are working through short and medium term actions to increase staffing and also improve the flow of patients in and out of hospital.One in 15 people in Scotland were estimated to have Covid last week as cases increased for the seventh week in a row.
Ms Knox said: "We recognise that experiencing long waits can lead to people getting frustrated but we ask that people be patient and be kind and considerate to our staff at all times. "While NHS staff work tirelessly, Scotland's missing in action Health Secretary is nowhere to be seen.
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