Introduction: This study aims to measure physicians' awareness of climate change impacts on health and their perceptions of their role in climate action (Turkey, Serbia, international group) Methods: Data were collected online using a questionnaire created by the researchers. Attempts were made to reach physicians in Turkey, Serbia, and Europe through medical professional associations. Results: More than 500 physicians, 70% from Turkey, answered the questionnaire. More respondents were female, had at least one child, were clinicians, worked in a hospital, and lived in a large city. Most physicians indicated that climate change poses a serious threat to health, and they are concerned about it. They also noted that climate action can mitigate climate change and adapt to the climate by changing our habits, and changes in government policy can accelerate this adaptation. Responses showed that physicians are aware of the health impacts of climate change. Physicians believe that while their colleagues play an important role in addressing the health impacts of climate change, they need more expertise and capacity building, and the health sector is not adequately prepared. Conclusions: Medical doctors have a privileged position in taking action for sustainable solutions to climate change. Their capacity should be expanded in climate mitigation and adaptation action.