diff --git a/IRaCIS.Core.Application/Service/Visit/PatientService.cs b/IRaCIS.Core.Application/Service/Visit/PatientService.cs
index 8e14c36df..850dc5d01 100644
--- a/IRaCIS.Core.Application/Service/Visit/PatientService.cs
+++ b/IRaCIS.Core.Application/Service/Visit/PatientService.cs
@@ -3410,9 +3410,9 @@ namespace IRaCIS.Application.Services
 
                 foreach (var item in result)
                 {
-                    item.SCPStudyId = existStudyIdList.FirstOrDefault(t => t.StudyInstanceUid == item.StudyInstanceUID).SCPStudyId;
+                    item.SCPStudyId = existStudyIdList.FirstOrDefault(t => t.StudyInstanceUid == item.StudyInstanceUID)?.SCPStudyId;
                     item.IsStudyExist = existStudyIdList.Any(t => t.StudyInstanceUid == item.StudyInstanceUID);
-                    item.HospitalGroupList = existStudyIdList.FirstOrDefault(t => t.StudyInstanceUid == item.StudyInstanceUID)?.HospitalGroupList;
+                    item.HospitalGroupList = existStudyIdList.FirstOrDefault(t => t.StudyInstanceUid == item.StudyInstanceUID)?.HospitalGroupList ?? new List<HospitalGroupInfo>();
 
                     if (isAdminOrOA)
                     {