A modular bracket assembly is provided for use with a field hospital portable bed or a NATO litter. The assembly includes a clamp that can be releasably attached to the pole of a litter. The clamp is formed with a mounting aperture. The assembly also includes a lower support that can be mounted in the mounting aperture of the clamp or in attachment holes of field hospital portable beds or the socket that is formed within each hinge when a collapsible litter. An accessory mount is provided on the lower support and can receive a mounting flange affixed to a medical accessory. An upper support can be mounted on the top end of the lower support and can be used to support medical equipment items and/or IV solutions.