Background: Real-time monitoring of patients is considered as the key issues in managing health care system. Wireless Body Area Networks (WBAN) is one of the wise health care monitoring systems holding applications in numerous fields like medical, wellness, military, sports and so forth. The correspondence standard for wireless body area networks is characterized by the IEEE 802.15.6 for the operation around the human body. In WBAN, network longevity is one noteworthy issue confronted following the constrained energy supply in body nodes. Methods: The primary goal of this work is to expand the network lifetime, so a Modified Position Aware algorithm is actualized where the spatial coordinates and battery status of every node is shared to all the nodes inside the network by incorporating the Probabilistic Energy Aware routing (PER), and Body Node Coordinator (BNC) is versatile in the network. Results: Simulation results demonstrates that the network lifetime is reliably improved. The placement of BNC using the Modified Position-Aware BNC Placement algorithm along with the PER protocol improves the network lifetime reliably. © 2006-2016 Asian Research Publishing Network (ARPN).