He has been in the Tuanku Mizan Military Hospital since Tuesday for psychiatric evaluation.
Doctors assigned to Rizalman did not return the Herald's calls yesterday.
A Ministry of Foreign Affairs and Trade spokeswoman said arrangements for his return were still being determined.
"However we do not anticipate any issues related to diplomatic immunity with his return to New Zealand."
Meanwhile Malaysian defence minister Hishammudin Hussein said Rizalman should not be tried in the media and public.
There is also now a gag order preventing military colleagues from speaking to reporters.
"When talking about justice, justice must not only be done but also must be seen to have been done," said Mr Hishammudin
Rizalman has been warded at the Tuanku Mizan Military Hospital in KL since Tuesday under close watch. Photo / Brett Phibbs
"In this case, justice should be served not only to the victim but also to the accused."
The New Straits Times reported that Rizalman is occupying a four-bed room at the hospital alone under guard.
He was also being monitored by closed-circuit television.