Emergency call (for acute life-threatening medical conditions): 112
Medical on-call service (at night, on weekends or holidays): 116 117
Dental on-call service (at night, on weekends or holidays): 0511 311031
In principle, however, all hospitals also help in acute emergencies.
If medical help is needed outside the office hours of the family doctor, the on-call service search of the Association of Statutory Health Insurance Physicians of Lower Saxony (KVN) can be used.