diff --git a/ReportImp/MVZMedikusGmbH/Invoicing/AssistenzInvoiceCreation.cs b/ReportImp/MVZMedikusGmbH/Invoicing/AssistenzInvoiceCreation.cs
index 11d9746e2..9a6b9f730 100644
--- a/ReportImp/MVZMedikusGmbH/Invoicing/AssistenzInvoiceCreation.cs
+++ b/ReportImp/MVZMedikusGmbH/Invoicing/AssistenzInvoiceCreation.cs
@@ -6,6 +6,7 @@ using BeWo.Data.Access;
 using BeWo.Data.Entities;
 using BeWo.Service.DCEntityMapper;
 using BeWo.Service.Invoicing;
+using BeWo.Service.Plugins;
 using BS.Shared;
 using BS.Shared.Core;
 using BS.Shared.DataContracts;
@@ -57,6 +58,51 @@ namespace MvzMedikus.Invoicing
             //return ii;
         }
 
+        public override void SetInvoiceItems(ServiceInvoice invoice,
+           ServiceInvoicePeriod serviceInvoicePeriod,
+           SupportConceptApprovalPeriodDC supportConceptApprovalPeriod,
+           CostBearer2SupportConcept cb2sc,
+           DateTimeSpan invoicePeriod,
+           List<ServiceRecordDC> serviceRecords)
+        {
+            Calculations calc = PluginLoader.FindClass<Calculations>(_SpecificID) ?? Calculations.GetInstance(_SpecificID);
+
+            if (ShouldCreateFixedAmounts(serviceInvoicePeriod, supportConceptApprovalPeriod, cb2sc))
+            {
+                CreateFixedAmounts(serviceInvoicePeriod, supportConceptApprovalPeriod, cb2sc);
+            }
+            else
+            {
+                List<ServiceRecordDC> serviceRecordsInPeriod = serviceRecords.Where(
+                    i =>
+                    {
+                        bool valid = i.Start.Value.InBetween(serviceInvoicePeriod.Start.Value,
+                            serviceInvoicePeriod.End.Value, true);
+
+                        if (valid && serviceInvoicePeriod.SupportConceptApprovalPeriod != null && serviceInvoicePeriod.SupportConceptApprovalPeriod.ServiceCategory != null)
+                            valid = serviceInvoicePeriod.SupportConceptApprovalPeriod.ServiceCategory.Oid ==
+                                    i.ServiceDescription.Category.ServiceCategoryOid;
+                        return valid;
+                    }).ToList();
+
+                if (serviceRecordsInPeriod.Count > 0)
+                {
+                    var absenceTimes = MapperFactory.AbsenceTimeDC_AbsenceTime.MapToNewDCs(cb2sc.SupportConcept.Customer.AbsenceTimes);
+                    Dictionary<DateTimeSpan, decimal> span2Hours = calc.GetAbsencesTimesNotBillable(absenceTimes);
+
+                    // serviceInvoicePeriod.HoursNotBillableAbsence - eingeschränkte Anzahl bei Abwesenheit GILT laut LVR ausdrücklich nicht bei Assistenzleistungen
+                    serviceInvoicePeriod.HoursNotBillableNotApproved +=
+                        calc.GetHoursNotBillableDueToMoreThanApproved(supportConceptApprovalPeriod,
+                            cb2sc.CostBearer.CostRatePeriods.MapToNewDCs(),
+                            serviceRecordsInPeriod,
+                            true, true);
+
+                    var itemList = CreateInvoiceItems(serviceRecordsInPeriod, invoicePeriod, serviceInvoicePeriod.SupportConceptApprovalPeriod, calc);
+                    serviceInvoicePeriod.InvoiceItemList.AddRange(itemList);
+                }
+            }
+        }
+
         public override IList<InvoiceItem> CreateSummaryInvoiceItems(IList<InvoiceItem> itemList, DateTimeSpan invoicePeriod, SupportConceptApprovalPeriod scap,
             Calculations calc, bool summaryPerMonth, bool addRateFactorToUnitCount)
         {