diff --git a/deid/dicom/parser.py b/deid/dicom/parser.py
index 5112b45d..49bb5ad6 100644
--- a/deid/dicom/parser.py
+++ b/deid/dicom/parser.py
@@ -426,14 +426,6 @@ def _run_action(self, field, action, value=None):
                 item=self.lookup, dicom=self.dicom, value=value, field=field
             )
             if value is not None:
-
-                # Cut out early if the field isn't in the dicom
-                if field.name not in self.dicom:
-                    return
-
-                # Preserve the old value in case we need to update
-                old_value = self.dicom[field.name].value
-
                 # Jitter the field by the supplied value
                 new_val = jitter_timestamp(field=field, value=value)
                 self.replace_field(field, new_val)