diff --git a/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DoctorVisitLogic.cs b/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DoctorVisitLogic.cs
new file mode 100644
index 0000000..6a70dcb
--- /dev/null
+++ b/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DoctorVisitLogic.cs
@@ -0,0 +1,130 @@
+using Microsoft.Extensions.Logging;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using VetclinicContracts.BindingModels;
+using VetclinicContracts.BusinessLogicsContracts;
+using VetclinicContracts.SearchModels;
+using VetclinicContracts.StoragesContracts;
+using VetclinicContracts.ViewModels;
+using VetclinicDataModels.Enums;
+
+namespace VetclinicBusinessLogic.BusinessLogics
+{
+	public class DoctorVisitLogic: IDoctorVisitLogic
+	{
+		private readonly ILogger _logger;
+		private readonly IDoctorVisitStorage _doctorVisitStorage;
+		public DoctorVisitLogic(ILogger<DoctorVisitLogic> logger, IDoctorVisitStorage doctorVisitStorage)
+		{
+			_logger = logger;
+			_doctorVisitStorage = doctorVisitStorage;
+		}
+		public List<DoctorVisitViewModel>? ReadList(DoctorVisitSearchModel? model)
+		{
+			_logger.LogInformation("ReadList. Id:{Id}", model?.Id);
+			var list = model == null ? _doctorVisitStorage.GetFullList() : _doctorVisitStorage.GetFilteredList(model);
+			if (list == null)
+			{
+				_logger.LogWarning("ReadList return null list");
+				return null;
+			}
+			_logger.LogInformation("ReadList. Count:{Count}", list.Count);
+			return list;
+		}
+		public DoctorVisitViewModel? ReadElement(DoctorVisitSearchModel model)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+
+			_logger.LogInformation("ReadElement. Id:{ Id}", model.Id);
+
+			var element = _doctorVisitStorage.GetElement(model);
+			if (element == null)
+			{
+				_logger.LogWarning("ReadElement element not found");
+				return null;
+			}
+
+			_logger.LogInformation("ReadElement find. Id:{Id}", element.Id);
+
+			return element;
+		}
+		public bool CreateDoctorVisit(DoctorVisitBindingModel model)
+		{
+			CheckModel(model);
+			if (model.Status != DoctorVisitStatus.Неизвестен)
+			{
+				_logger.LogWarning("Wrong DoctorVisit status. Insert operation failed");
+				return false;
+			}
+			model.Status = DoctorVisitStatus.Забронировано;
+			if (_doctorVisitStorage.Insert(model) == null)
+			{
+				_logger.LogWarning("Insert operation failed");
+				return false;
+			}
+			return true;
+		}
+		public bool ChangeStatus(DoctorVisitBindingModel model, DoctorVisitStatus status)
+		{
+			CheckModel(model, false);
+			var element = _doctorVisitStorage.GetElement(new DoctorVisitSearchModel { Id = model.Id });
+			if (element == null)
+			{
+				_logger.LogWarning("Read operation failed");
+				return false;
+			}
+			if (element.Status != status - 1)
+			{
+				_logger.LogWarning("Status change operation failed");
+				throw new InvalidOperationException("Текущий статус заказа не может быть переведен в выбранный");
+			}
+			DoctorVisitStatus oldStatus = model.Status;
+			model.Status = status;
+			/* РАЗ УЖ НЕТ ДАТЫ ОКОНЧАНИЯ ТО ЭТО НЕ НАДО?
+			if (model.Status == DoctorVisitStatus.Закончен)
+			{
+				model.DateImplement = DateTime.Now;
+			}
+			*/
+			if (_doctorVisitStorage.Update(model) == null)
+			{
+				model.Status = oldStatus;
+				_logger.LogWarning("Update operation failed");
+				return false;
+			}
+			return true;
+		}
+
+		public bool BeginDoctorVisit(DoctorVisitBindingModel model)
+		{
+			return ChangeStatus(model, DoctorVisitStatus.Выполняется);
+		}
+		public bool FinishDoctorVisit(DoctorVisitBindingModel model)
+		{
+			return ChangeStatus(model, DoctorVisitStatus.Закончен);
+		}
+		private void CheckModel(DoctorVisitBindingModel model, bool withParams = true)
+		{
+			if (model == null)
+			{
+				throw new ArgumentNullException(nameof(model));
+			}
+			if (!withParams)
+			{
+				return;
+			}
+			if (model.DateVisit != null)
+			{
+				throw new ArithmeticException("Дата завершения не может быть раньше даты начала");
+			}
+			_logger.LogInformation("DoctorVisit. Id:{Id}. DateVisit:{DateVisit}. ServiceId:{ServiceId}. AnimalId:{AnimalId}",
+				model.Id, model.DateVisit, model.ServiceId, model.AnimalId);
+		}
+	}
+}
diff --git a/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DrugPurchaseLogic.cs b/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DrugPurchaseLogic.cs
index 8a9a7aa..f764264 100644
--- a/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DrugPurchaseLogic.cs
+++ b/Vetclinic/VetclinicBusinessLogic/BusinessLogics/DrugPurchaseLogic.cs
@@ -133,7 +133,7 @@ namespace VetclinicBusinessLogic.BusinessLogics
 			{
 				throw new ArithmeticException("Дата завершения не может быть раньше даты начала");
 			}
-			_logger.LogInformation("DrugPurchase. Id:{Id}. Sum:{Sum}. AnimalId:{AnimalId}", model.Id, model.Sum, model.AnimalId);
+			_logger.LogInformation("DrugPurchase. Id:{Id}. Cost:{Cost}. DrugId:{DrugId}. AnimalId:{DrugId}", model.Id, model.Cost, model.DrugId, model.AnimalId);
 		}
 	}
 }