diff --git a/clients/client-xray/src/commands/GetTraceSummariesCommand.ts b/clients/client-xray/src/commands/GetTraceSummariesCommand.ts
index 6e5938258e66..6a0832b2ce20 100644
--- a/clients/client-xray/src/commands/GetTraceSummariesCommand.ts
+++ b/clients/client-xray/src/commands/GetTraceSummariesCommand.ts
@@ -63,7 +63,7 @@ export interface GetTraceSummariesCommandOutput extends GetTraceSummariesResult,
  * const input = { // GetTraceSummariesRequest
  *   StartTime: new Date("TIMESTAMP"), // required
  *   EndTime: new Date("TIMESTAMP"), // required
- *   TimeRangeType: "TraceId" || "Event",
+ *   TimeRangeType: "TraceId" || "Event" || "Service",
  *   Sampling: true || false,
  *   SamplingStrategy: { // SamplingStrategy
  *     Name: "PartialScan" || "FixedRate",
diff --git a/clients/client-xray/src/models/models_0.ts b/clients/client-xray/src/models/models_0.ts
index 955d4d656576..0a0435437ed6 100644
--- a/clients/client-xray/src/models/models_0.ts
+++ b/clients/client-xray/src/models/models_0.ts
@@ -2295,6 +2295,7 @@ export interface SamplingStrategy {
  */
 export const TimeRangeType = {
   Event: "Event",
+  Service: "Service",
   TraceId: "TraceId",
 } as const;
 
@@ -2321,7 +2322,7 @@ export interface GetTraceSummariesRequest {
 
   /**
    * @public
-   * <p>A parameter to indicate whether to query trace summaries by TraceId or Event time.</p>
+   * <p>A parameter to indicate whether to query trace summaries by TraceId, Event (trace update time), or Service (segment end time).</p>
    */
   TimeRangeType?: TimeRangeType;
 
diff --git a/codegen/sdk-codegen/aws-models/xray.json b/codegen/sdk-codegen/aws-models/xray.json
index a1299ba4d235..ba947e34e668 100644
--- a/codegen/sdk-codegen/aws-models/xray.json
+++ b/codegen/sdk-codegen/aws-models/xray.json
@@ -3287,7 +3287,7 @@
         "TimeRangeType": {
           "target": "com.amazonaws.xray#TimeRangeType",
           "traits": {
-            "smithy.api#documentation": "<p>A parameter to indicate whether to query trace summaries by TraceId or Event time.</p>"
+            "smithy.api#documentation": "<p>A parameter to indicate whether to query trace summaries by TraceId, Event (trace update time), or Service (segment end time).</p>"
           }
         },
         "Sampling": {
@@ -5558,6 +5558,12 @@
           "traits": {
             "smithy.api#enumValue": "Event"
           }
+        },
+        "Service": {
+          "target": "smithy.api#Unit",
+          "traits": {
+            "smithy.api#enumValue": "Service"
+          }
         }
       }
     },