diff --git a/generic/management/commands/checkdicoms.py b/generic/management/commands/checkdicoms.py
index d50df6b7..047a6692 100644
--- a/generic/management/commands/checkdicoms.py
+++ b/generic/management/commands/checkdicoms.py
@@ -37,12 +37,12 @@ class Command(BaseCommand):
             for code in site_codes:
                 # TODO rewrite
                 try:
-                    if code in ds.PatientID:
+                    if code in ds.PatientID.lower():
                         self.stdout.write(self.style.WARNING(f"Identifiable dicom {file}"))
                 except AttributeError:
                     pass
                 try:
-                    if code in ds.AccessionNumber:
+                    if code in ds.AccessionNumber.lower():
                         self.stdout.write(self.style.WARNING(f"Identifiable dicom {file}"))
                 except AttributeError:
                     pass