diff --git a/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift b/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift
index db3c28c4..502682c2 100644
--- a/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift
+++ b/MVMCoreUI/Atomic/Atoms/FormFields/TextFields/MdnEntryField.swift
@@ -215,8 +215,12 @@ import MVMCore
         
         proprietorTextDelegate?.textFieldDidEndEditing?(textField)
         
-        if validateMDNTextField() && isNationalMDN {
-            textField.text = MVMCoreUIUtility.formatMdn(textField.text)
+        if validateMDNTextField() {
+            if isNationalMDN {
+                textField.text = MVMCoreUIUtility.formatMdn(textField.text)
+            }
+            // Validate the base input field along with triggering form field validation rules.
+            validateText()
         }
     }