diff --git a/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs b/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs
index eb996b0..0d68d07 100644
--- a/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs
+++ b/Medical/MedicalPostgresqlDatabase/Storages/DoctorsStorage.cs
@@ -17,7 +17,7 @@ namespace MedicalPostgresqlDatabase.Storages
         {
             return new Doctor
             {
-                Id = Convert.ToInt32(reader.GetOrdinal("doctor_id")),
+                Id = Convert.ToInt32(reader.GetOrdinal(PRIMARY_KEY_COLUMN_NAME)),
                 Name = Convert.ToString(reader.GetOrdinal("name")),
                 Surname = Convert.ToString(reader.GetOrdinal("surname")),
                 Patronymic = Convert.ToString(reader.GetOrdinal("patronymic")),