diff --git a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java
index 159e637eaa..12d2d43d38 100644
--- a/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java
+++ b/combo/src/main/java/info/nightscout/androidaps/plugins/pump/combo/ComboFragment.java
@@ -54,6 +54,7 @@ public class ComboFragment extends DaggerFragment {
     private Button refreshButton;
     private TextView bolusCount;
     private TextView tbrCount;
+    private TextView serialNumber;
 
     @Override
     public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
@@ -70,6 +71,7 @@ public class ComboFragment extends DaggerFragment {
         tempBasalText = view.findViewById(R.id.combo_temp_basal);
         bolusCount = view.findViewById(R.id.combo_bolus_count);
         tbrCount = view.findViewById(R.id.combo_tbr_count);
+        serialNumber= view.findViewById(R.id.combo_serial_number);
 
         refreshButton = view.findViewById(R.id.combo_refresh_button);
         refreshButton.setOnClickListener(v -> {
@@ -242,6 +244,7 @@ public class ComboFragment extends DaggerFragment {
             // stats
             bolusCount.setText(String.valueOf(sp.getLong(ComboPlugin.COMBO_BOLUSES_DELIVERED, 0L)));
             tbrCount.setText(String.valueOf(sp.getLong(ComboPlugin.COMBO_TBRS_SET, 0L)));
+            serialNumber.setText(comboPlugin.serialNumber());
         }
     }
 }
\ No newline at end of file
diff --git a/combo/src/main/res/layout/combopump_fragment.xml b/combo/src/main/res/layout/combopump_fragment.xml
index 8e13a5fb8f..2ee9e41508 100644
--- a/combo/src/main/res/layout/combopump_fragment.xml
+++ b/combo/src/main/res/layout/combopump_fragment.xml
@@ -462,6 +462,51 @@
 
             </LinearLayout>
 
+            <View
+                android:layout_width="fill_parent"
+                android:layout_height="2dip"
+                android:layout_marginBottom="5dp"
+                android:layout_marginLeft="20dp"
+                android:layout_marginRight="20dp"
+                android:layout_marginTop="5dp"
+                android:background="@color/list_delimiter" />
+
+            <LinearLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:orientation="horizontal">
+
+                <TextView
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1.5"
+                    android:gravity="end"
+                    android:paddingRight="5dp"
+                    android:text="@string/combo_serial_number"
+                    android:textSize="14sp" />
+
+                <TextView
+                    android:layout_width="5dp"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="0"
+                    android:gravity="center_horizontal"
+                    android:paddingEnd="2dp"
+                    android:paddingStart="2dp"
+                    android:text=":"
+                    android:textSize="14sp" />
+
+                <TextView
+                    android:id="@+id/combo_serial_number"
+                    android:layout_width="match_parent"
+                    android:layout_height="wrap_content"
+                    android:layout_weight="1"
+                    android:gravity="start"
+                    android:paddingLeft="5dp"
+                    android:textColor="@android:color/white"
+                    android:textSize="14sp" />
+
+            </LinearLayout>
+
             <View
                 android:layout_width="fill_parent"
                 android:layout_height="2dip"
diff --git a/combo/src/main/res/values/strings.xml b/combo/src/main/res/values/strings.xml
index 5c41d1ab90..555a910c3f 100644
--- a/combo/src/main/res/values/strings.xml
+++ b/combo/src/main/res/values/strings.xml
@@ -54,4 +54,5 @@
     <string name="combo_tbr_count">TBR count</string>
     <string name="bolusstopped">Bolus stopped</string>
     <string name="bolusstopping">Stopping bolus</string>
+    <string name="combo_serial_number">Pump identifier</string>
 </resources>
\ No newline at end of file