We are able to care for the sick, the spokeswoman said, adding that a majority of indictees arrived in The Hague with some diagnosis.
The tribunal has its own medical centre as well as access to the Dutch medical system.
She declined to comment on the health condition of Mladic, who was arrested on Thursday after being on the run for 16 years. His family insists on his transfer to a hospital in Belgrade due to his poor condition.
After hearing him, a court in Belgrade said that Mladic was fit to be extradited in The Hague where he will face genocide charges.