The menus represent 41 per cent of all schools in the province.
The medical society says it's not clear whether the remainder of the menus meet provincial guidelines.
Vanessa Yurchesyn, co-chairwoman of NB Dieticians in Action, says many of the menus would have met nutritional guidelines were it not for the daily inclusion of food such as burgers, pizza or cookies.
Yurchesyn says according to provincial policy, these foods can only be served twice a week.
The medical society says stories of schools serving exceptional food will be included in a guide to be released next week.