diff --git a/xds/src/main/java/io/grpc/xds/EnvoyProtoData.java b/xds/src/main/java/io/grpc/xds/EnvoyProtoData.java
index 633bd6af91..a17d56789a 100644
--- a/xds/src/main/java/io/grpc/xds/EnvoyProtoData.java
+++ b/xds/src/main/java/io/grpc/xds/EnvoyProtoData.java
@@ -1358,6 +1358,9 @@ final class EnvoyProtoData {
       io.envoyproxy.envoy.api.v2.endpoint.ClusterStats.Builder builder =
           io.envoyproxy.envoy.api.v2.endpoint.ClusterStats.newBuilder()
               .setClusterName(clusterName);
+      if (clusterServiceName != null) {
+        builder.setClusterServiceName(clusterServiceName);
+      }
       for (UpstreamLocalityStats upstreamLocalityStats : upstreamLocalityStatsList) {
         builder.addUpstreamLocalityStats(
             upstreamLocalityStats.toEnvoyProtoUpstreamLocalityStatsV2());
diff --git a/xds/src/test/java/io/grpc/xds/EnvoyProtoDataTest.java b/xds/src/test/java/io/grpc/xds/EnvoyProtoDataTest.java
index 600075fc41..1bfeb866fe 100644
--- a/xds/src/test/java/io/grpc/xds/EnvoyProtoDataTest.java
+++ b/xds/src/test/java/io/grpc/xds/EnvoyProtoDataTest.java
@@ -557,6 +557,7 @@ public class EnvoyProtoDataTest {
     ClusterStats clusterStats =
         ClusterStats.newBuilder()
             .setClusterName("cluster1")
+            .setClusterServiceName("backend-service1")
             .setLoadReportIntervalNanos(1234)
             .setTotalDroppedRequests(123)
             .addUpstreamLocalityStats(UpstreamLocalityStats.newBuilder()
@@ -579,6 +580,7 @@ public class EnvoyProtoDataTest {
     assertThat(clusterStatsProto).isEqualTo(
         io.envoyproxy.envoy.config.endpoint.v3.ClusterStats.newBuilder()
             .setClusterName("cluster1")
+            .setClusterServiceName("backend-service1")
             .setLoadReportInterval(Durations.fromNanos(1234))
             .setTotalDroppedRequests(123)
             .addUpstreamLocalityStats(
@@ -605,6 +607,7 @@ public class EnvoyProtoDataTest {
     assertThat(clusterStatsProtoV2).isEqualTo(
         io.envoyproxy.envoy.api.v2.endpoint.ClusterStats.newBuilder()
             .setClusterName("cluster1")
+            .setClusterServiceName("backend-service1")
             .setLoadReportInterval(Durations.fromNanos(1234))
             .setTotalDroppedRequests(123)
             .addUpstreamLocalityStats(