diff --git a/arztapi/APIHandler.py b/arztapi/APIHandler.py
index dae758a..14f105c 100644
--- a/arztapi/APIHandler.py
+++ b/arztapi/APIHandler.py
@@ -126,6 +126,7 @@ class APIHandler:
 
         # Filter for the relevant therapy times before processing
         self.filter_for_therapy_types(therapy_types)
+        self.filter_for_duplicates()
 
     def get_list_of_doctors_from_api(self, lat, lon, req_val_base64, therapy_types, therapy_age,
                                      therapy_setting) -> ArztPraxisDatas:
@@ -204,6 +205,10 @@ class APIHandler:
         # Update with relevant phone times
         self.phone_times.arztPraxisDatas = relevant_phone_times
 
+    def filter_for_duplicates(self):
+        self.phone_times.arztPraxisDatas = [i for n, i in enumerate(self.phone_times.arztPraxisDatas)
+                                            if i not in self.phone_times.arztPraxisDatas[:n]]
+
     def get_general_doctor_information(self) -> List[DoctorInformation]:
         """
         Transform and filter data to more usable format: Check for phone times and collect general doctor information