Arabic translation: العيادة الخارجية للمسالك البولية
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"Ambulant" means "walking" or "able to walk," while "ambulatory," among other things, can mean "providing care on an outpatient basis." It is, therefore necessary to find out which of the two words (and which meaning) is intended.
It appears that the material you are translating was written by a non-native user of English (In English, we use "oncology," not "onkology"). Therefore, it may be wise to check with your client whether "ambulatory" (not "ambulant") was meant.