Owing to the recent advancement in IoT devices, the popularity of wireless devices in healthcare is growing rapidly. Thus it is anticipated that the healthcare services may face challenges such as medical spectrum scarcity, electromagnetic interference to bio-medical devices, medical data transmission reliability, etc. To overcome these issues, cognitive radio can be improvised and fine-tuned the wireless healthcare service system. However, contemporary researches on cognitive radio driven healthcare system have shown limited guidelines for medical emergency concerned network model and communication protocols. Thus this paper presents intelligent dynamic priority medical traffic transmission mechanism aware three Device to Device communication protocols for cognitve radio enabled hospital management system known as CogMed. To validate the performance of these protocols, several simulations are conducted, where it is observed that the CogMed transmission scheme performs better than other well established Methods. Moreover, the latency of majority hospital devices is within the threshold level of the Federal Drug and Food Administration prescribed standards for wireless medical devices.