diff --git a/api/dicom-web/controller/MWL-RS/service/create-mwlitem.service.js b/api/dicom-web/controller/MWL-RS/service/create-mwlitem.service.js
index dd43c762..920b355d 100644
--- a/api/dicom-web/controller/MWL-RS/service/create-mwlitem.service.js
+++ b/api/dicom-web/controller/MWL-RS/service/create-mwlitem.service.js
@@ -89,7 +89,7 @@ class CreateMwlItemService {
 
     async checkPatientExist() {
         let patientID = this.requestMwlItemDicomJsonModel.getString("00100020");
-        let patientCount = await PatientModel.count({ 
+        let patientCount = await PatientModel.countDocuments({ 
             patientID 
         });
         if (patientCount <= 0) {