diff --git a/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceController.java b/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceController.java
index 2830024..200a47b 100644
--- a/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceController.java
+++ b/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceController.java
@@ -39,13 +39,18 @@
 import com.android.settings.applications.AppInfoBase;
 import com.android.settings.core.PreferenceControllerMixin;
 import com.android.settings.core.SubSettingLauncher;
+import com.android.settings.flags.Flags;
 import com.android.settings.notification.NotificationBackend;
 import com.android.settingslib.PrimarySwitchPreference;
 import com.android.settingslib.RestrictedSwitchPreference;
 
 import java.util.ArrayList;
 import java.util.Collections;
+import java.util.HashMap;
+import java.util.HashSet;
 import java.util.List;
+import java.util.Map;
+import java.util.Set;
 
 /**
  * Populates the PreferenceCategory with notification channels associated with the given app.
@@ -61,6 +66,9 @@
     private RestrictedSwitchPreference mAllNotificationsToggle;
     private PreferenceCategory mPreferenceCategory;
     private List<NotificationChannel> mChannels = new ArrayList<>();
+    private Set<String> mDuplicateChannelNames = new HashSet<>();
+    private Map<NotificationChannel, String> mChannelGroupNames =
+            new HashMap<NotificationChannel, String>();
 
     public AppChannelsBypassingDndPreferenceController(
             Context context,
@@ -135,10 +143,20 @@
                 List<NotificationChannel> newChannelList = new ArrayList<>();
                 List<NotificationChannelGroup> mChannelGroupList = mBackend.getGroups(mAppRow.pkg,
                         mAppRow.uid).getList();
+                Set<String> allChannelNames = new HashSet<>();
                 for (NotificationChannelGroup channelGroup : mChannelGroupList) {
                     for (NotificationChannel channel : channelGroup.getChannels()) {
                         if (!isConversation(channel)) {
                             newChannelList.add(channel);
+                            if (Flags.dedupeDndSettingsChannels()) {
+                                mChannelGroupNames.put(channel, channelGroup.getName().toString());
+                                // Check if channel name is unique on this page; if not, save it.
+                                if (allChannelNames.contains(channel.getName())) {
+                                    mDuplicateChannelNames.add(channel.getName().toString());
+                                } else {
+                                    allChannelNames.add(channel.getName().toString());
+                                }
+                            }
                         }
                     }
                 }
@@ -172,6 +190,17 @@
                             && isChannelConfigurable(channel)
                             && showNotification(channel));
             channelPreference.setTitle(BidiFormatter.getInstance().unicodeWrap(channel.getName()));
+            if (Flags.dedupeDndSettingsChannels()) {
+                // If the channel shares its name with another channel, set group name as summary
+                // to disambiguate in the list.
+                if (mDuplicateChannelNames.contains(channel.getName().toString())
+                        && mChannelGroupNames.containsKey(channel)
+                        && mChannelGroupNames.get(channel) != null
+                        && !mChannelGroupNames.get(channel).isEmpty()) {
+                    channelPreference.setSummary(BidiFormatter.getInstance().unicodeWrap(
+                            mChannelGroupNames.get(channel)));
+                }
+            }
             channelPreference.setChecked(showNotificationInDnd(channel));
             channelPreference.setOnPreferenceChangeListener(
                     new Preference.OnPreferenceChangeListener() {
diff --git a/tests/robotests/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceControllerTest.java b/tests/robotests/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceControllerTest.java
index 13528b4..053b352 100644
--- a/tests/robotests/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceControllerTest.java
+++ b/tests/robotests/src/com/android/settings/notification/app/AppChannelsBypassingDndPreferenceControllerTest.java
@@ -26,16 +26,19 @@
 import android.app.NotificationManager;
 import android.content.Context;
 import android.content.pm.ParceledListSlice;
+import android.platform.test.flag.junit.SetFlagsRule;
 
 import androidx.preference.PreferenceCategory;
 import androidx.preference.PreferenceManager;
 import androidx.preference.PreferenceScreen;
 import androidx.test.core.app.ApplicationProvider;
 
+import com.android.settings.flags.Flags;
 import com.android.settings.notification.NotificationBackend;
 import com.android.settingslib.PrimarySwitchPreference;
 
 import org.junit.Before;
+import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.mockito.Mock;
@@ -51,6 +54,9 @@
 @LooperMode(LooperMode.Mode.LEGACY)
 public class AppChannelsBypassingDndPreferenceControllerTest {
 
+    @Rule
+    public final SetFlagsRule mSetFlagsRule = new SetFlagsRule();
+
     @Mock
     private NotificationBackend mBackend;
 
@@ -150,4 +156,44 @@
         }
         return new ParceledListSlice<>(Collections.singletonList(group));
     }
+
+    @Test
+    public void displayPreference_duplicateChannelName_AddsGroupNameAsSummary() {
+        mSetFlagsRule.enableFlags(Flags.FLAG_DEDUPE_DND_SETTINGS_CHANNELS);
+        NotificationChannelGroup group1 = new NotificationChannelGroup("group1_id", "Group1");
+        NotificationChannelGroup group2 = new NotificationChannelGroup("group2_id", "Group2");
+
+        group1.addChannel(new NotificationChannel("mail_group1_id", "Mail",
+                NotificationManager.IMPORTANCE_DEFAULT));
+        group1.addChannel(new NotificationChannel("other_group1_id", "Other",
+                NotificationManager.IMPORTANCE_DEFAULT));
+
+        group2.addChannel(new NotificationChannel("music_group2_id", "Music",
+                NotificationManager.IMPORTANCE_DEFAULT));
+        // This channel has the same name as a channel in group1.
+        group2.addChannel(new NotificationChannel("mail_group2_id", "Mail",
+                NotificationManager.IMPORTANCE_DEFAULT));
+
+        ParceledListSlice<NotificationChannelGroup> groups = new ParceledListSlice<>(
+                new ArrayList<NotificationChannelGroup>() {
+                    {
+                        add(group1);
+                        add(group2);
+                    }
+                }
+        );
+
+        when(mBackend.getGroups(eq(mAppRow.pkg), eq(mAppRow.uid))).thenReturn(groups);
+        mController.displayPreference(mPreferenceScreen);
+        ShadowApplication.runBackgroundTasks();
+        // Check that we've added the group name as a summary to channels that have identical names.
+        // Channels are also alphabetized.
+        assertThat(mCategory.getPreference(1).getTitle().toString()).isEqualTo("Mail");
+        assertThat(mCategory.getPreference(1).getSummary().toString()).isEqualTo("Group1");
+        assertThat(mCategory.getPreference(2).getTitle().toString()).isEqualTo("Mail");
+        assertThat(mCategory.getPreference(2).getSummary().toString()).isEqualTo("Group2");
+        assertThat(mCategory.getPreference(3).getTitle().toString()).isEqualTo("Music");
+        assertThat(mCategory.getPreference(4).getTitle().toString()).isEqualTo("Other");
+
+    }
 }