Two doctors and 16paramedic have tested positive for coronavirus at DSCI.
The official said authorities are investigating how the staffers contracted the infection as the cancer institute was not admitting COVID-19 patients.
"We have closed the OPD facility as of now, and though the IPD facility is running, patients are slowly being shifted to a nearby facility, so that the entire premises can be sanitised," he said.
The process should take two days and patients would be brought back after that, he added.
On Monday, another official said 24 healthcare personnel of the hospital have been asked to remain in home quarantine.
Earlier Tuesday, Delhi Chief Minister Arvind Kejriwal said 523 coronavirus cases have been found in Delhi. Kejriwal said the government will effectively trace people who came in contact with COVID-19 patients to see if they too have contracted the virus. KND ABHABHABH