Related Rule
New Zealand
Practice Relating to Rule 110. Treatment and Care of the Wounded, Sick and Shipwrecked
New Zealand’s Military Manual (1992) provides: “The sick, wounded and shipwrecked members of the armed forces and others entitled to be treated as combatants … shall not be … left without proper medical care and attention; nor exposed to conditions which might result in contagion or infection.” 
New Zealand, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, § 1004(1).
In the case of non-international armed conflicts, the manual states that all possible steps must be taken to ensure the adequate care of the wounded, sick and shipwrecked. 
New Zealand, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, § 1817.
New Zealand’s Military Manual (1992) states: “Only urgent medical requirements will justify any priority in treatment among those who are sick and wounded.” 
New Zealand, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, § 1004(2).
(emphasis added)
With regard to civilian sick and wounded, the manual states:
There is no absolute obligation to accept civilian wounded and sick only so far as it is practicable to do so. For example, if military medical facilities are not being used but might be used in the immediate future because of an impending battle, there is no obligation to treat civilians. Once a civilian patient has been accepted, however, discrimination against him/her on other than medical grounds is not permissible. 
New Zealand, Interim Law of Armed Conflict Manual, DM 112, New Zealand Defence Force, Headquarters, Directorate of Legal Services, Wellington, November 1992, § 1003(2).