diff --git a/src/main/java/DNPM/services/mtb/DefaultMtbService.java b/src/main/java/DNPM/services/mtb/DefaultMtbService.java
index 4028273..e14e1d7 100644
--- a/src/main/java/DNPM/services/mtb/DefaultMtbService.java
+++ b/src/main/java/DNPM/services/mtb/DefaultMtbService.java
@@ -7,6 +7,7 @@ import java.util.Comparator;
 import java.util.List;
 import java.util.Optional;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
 /**
  * Standardimplementierung des MtbService
@@ -32,14 +33,17 @@ public class DefaultMtbService implements MtbService {
      */
     @Override
     public String getProtocol(List<Procedure> procedures) {
-        return procedures.stream()
+        return this.sortedDistinctProcedureProtocolList(procedures.stream())
+                .collect(Collectors.joining("\n\n"));
+    }
+
+    private Stream<String> sortedDistinctProcedureProtocolList(Stream<Procedure> procedures) {
+        return procedures
                 .sorted(Comparator.comparing(Procedure::getStartDate))
-                .map(procedure -> this.procedureToProtocolMapper(procedure).apply(procedure))
+                .map(this::selectAndApplyMapper)
                 .filter(Optional::isPresent)
                 .map(Optional::get)
-                .distinct()
-                .collect(Collectors.joining("\n\n"));
-
+                .distinct();
     }
 
     /**
diff --git a/src/main/java/DNPM/services/mtb/MtbService.java b/src/main/java/DNPM/services/mtb/MtbService.java
index 939be70..19a6c3a 100644
--- a/src/main/java/DNPM/services/mtb/MtbService.java
+++ b/src/main/java/DNPM/services/mtb/MtbService.java
@@ -3,6 +3,7 @@ package DNPM.services.mtb;
 import de.itc.onkostar.api.Procedure;
 
 import java.util.List;
+import java.util.Optional;
 
 public interface MtbService {
     /**
@@ -18,4 +19,13 @@ public interface MtbService {
      * @return Mapper für diese Prozedur
      */
     ProcedureToProtocolMapper procedureToProtocolMapper(Procedure procedure);
+
+    /**
+     * Select mapper using method {@link #procedureToProtocolMapper(Procedure)} and apply procedure
+     * @param procedure The Procedure to select mapper for and apply
+     * @return {@link Optional} with protocol or empty {@link Optional}
+     */
+    default Optional<String> selectAndApplyMapper(Procedure procedure) {
+        return this.procedureToProtocolMapper(procedure).apply(procedure);
+    }
 }