Previous studies were able to show that hazardous alcohol and substance abuse among physicians is not rare. Currently no recent data to detect risk groups are available either on the prevalence of hazardous drinking disorders and risky health behaviour among physicians or on influencing factors (age, gender, role, institution, specialization, working hours).A 42-item online questionnaire was distributed to 38 university hospitals, 296 teaching hospitals and 1290 physicians in private practice. The questionnaire addressed health behaviour and alcohol/substance consumption as well as demographic and work-related properties.Out of 1338 a total of 920 questionnaires could be evaluated. 90% of physicians estimate their health status as satisfying. 23% of doctors consume hazard quantities of ethanol, 5% are nicotine addicted, and 8% suffer from obesity. Childlessness ( = 0,004; OR = 1,67; KI = 1,17-2,37) for both genders and the role of a resident for females ( = 0,046, OR = 3,10, KI = 1,02-9,40) poses a risk factor for hazardous alcohol consumption. Weekly working hours of more than 50 h ( = 0,009; OR = 1,56; KI = 1,12-2,18) and a surgical profession ( < 0,001; OR = 2,03; KI = 1,47-2,81) may also be a risk factor towards hazardous and risky health behaviour.A more structured and frequently repeated education on help offerings and specific institutions for addicted and risk groups seems essential.