After accidents, in case of emergencies or if your child becomes ill outside of a doctor's office hours, you can call the emergency medical service or, in very urgent cases, contact the emergency services directly.
The most important telephone numbers that apply throughout Germany:
Rescue service: 112
Medical Emergency Service: 116117
Medical emergency service in your area: https://116117info.de/html/de
Poison emergency call Berlin: 030 - 19240
Pediatrician and Youth Medical Service in Berlin: https://www.kvberlin.de/30patienten/10bereitschaftsdienst/20kinderarzt/
If the child is transportable, you can also go directly to the ambulance in the hospitals.
Hospitals in Berlin: http://www.berliner-krankenhausverzeichnis.de/de/suche/Regional.html
Even pharmacies have a night or emergency service. Current information can be found in your local newspaper.