United Lincolnshire Hospitals Trust has cancelled outpatient appointments at its hospitals with immediate effect.
The trust, which runs hospitals in Lincoln, Boston and Grantham, said patients should now not attend their appointments unless contacted directly.
Health bosses said they made the decision as part of plans to prevent the spread of coronavirus.
Follow live updates on coronavirus from around Lincoln and Lincolnshire
A spokesperson for ULHT said: “United Lincolnshire Hospitals NHS Trust is working hard to prevent the spread of coronavirus and to protect our patients and staff from becoming seriously ill.
“We have, therefore, made the difficult decision to suspend all non-urgent outpatient appointments.
“We are asking patients to not attend your outpatient appointment unless we have contacted you directly.
“The trust is conducting some outpatient appointments by telephone or video calling too, and we have contacted these patients individually.
“Appointments will be rearranged for a future date at a time when it is safe to do so.”
The trust has already suspended patient visiting at its hospitals in an effort to tackle COVID-19.
Today (April 2), it was announced a further two patients who tested positive for coronavirus have died in Lincolnshire’s hospitals.
It takes the total death toll in the county up to 11.
SUBSCRIBE TO LOCAL DEMOCRACY WEEKLY, our exclusive email newsletter with highlights from our coverage every week and insights and analysis from our local democracy reporters.