diff --git a/smash/web/models/worker.py b/smash/web/models/worker.py
index 5e051e75cc9c3b9d3f66dea06f0b2231b6acdbf6..3272433486b8347f765dc6fea8eaeef634b5585e 100644
--- a/smash/web/models/worker.py
+++ b/smash/web/models/worker.py
@@ -36,6 +36,12 @@ class Worker(models.Model):
     email = models.EmailField(
         verbose_name='E-mail'
     )
+    screening_number_prefix = models.CharField(max_length=1,
+        null=True,
+        blank=True,
+        verbose_name='Default screening number prefix',
+    )
+
     ROLE_CHOICES_SECRETARY = "SECRETARY"
     ROLE_CHOICES = (
         ('DOCTOR', 'Doctor'),