diff --git a/clients/client-neptune-graph/src/models/models_0.ts b/clients/client-neptune-graph/src/models/models_0.ts
index 66cab77c102ff..e267cf6f39131 100644
--- a/clients/client-neptune-graph/src/models/models_0.ts
+++ b/clients/client-neptune-graph/src/models/models_0.ts
@@ -650,6 +650,11 @@ export interface CreateGraphInput {
 
   /**
    * <p>The number of replicas in other AZs. Min =0, Max = 2, Default = 1.</p>
+   *          <important>
+   *             <p>
+   *         Additional charges equivalent to the m-NCUs selected for the graph apply for each replica.
+   *       </p>
+   *          </important>
    * @public
    */
   replicaCount?: number;
@@ -1328,6 +1333,11 @@ export interface RestoreGraphFromSnapshotInput {
 
   /**
    * <p>The number of replicas in other AZs. Min =0, Max = 2, Default =1</p>
+   *          <important>
+   *             <p>
+   *         Additional charges equivalent to the m-NCUs selected for the graph apply for each replica.
+   *       </p>
+   *          </important>
    * @public
    */
   replicaCount?: number;
@@ -2477,6 +2487,11 @@ export interface CreateGraphUsingImportTaskInput {
 
   /**
    * <p>The number of replicas in other AZs to provision on the new graph after import. Default = 0, Min = 0, Max = 2.</p>
+   *          <important>
+   *             <p>
+   *         Additional charges equivalent to the m-NCUs selected for the graph apply for each replica.
+   *       </p>
+   *          </important>
    * @public
    */
   replicaCount?: number;
diff --git a/codegen/sdk-codegen/aws-models/neptune-graph.json b/codegen/sdk-codegen/aws-models/neptune-graph.json
index 26aef93d48c12..501ca55b51054 100644
--- a/codegen/sdk-codegen/aws-models/neptune-graph.json
+++ b/codegen/sdk-codegen/aws-models/neptune-graph.json
@@ -1818,7 +1818,7 @@
         "replicaCount": {
           "target": "com.amazonaws.neptunegraph#ReplicaCount",
           "traits": {
-            "smithy.api#documentation": "<p>The number of replicas in other AZs. Min =0, Max = 2, Default = 1.</p>"
+            "smithy.api#documentation": "<p>The number of replicas in other AZs. Min =0, Max = 2, Default = 1.</p>\n         <important>\n            <p>\n        Additional charges equivalent to the m-NCUs selected for the graph apply for each replica.\n      </p>\n         </important>"
           }
         },
         "deletionProtection": {
@@ -2141,7 +2141,7 @@
         "replicaCount": {
           "target": "com.amazonaws.neptunegraph#ReplicaCount",
           "traits": {
-            "smithy.api#documentation": "<p>The number of replicas in other AZs to provision on the new graph after import. Default = 0, Min = 0, Max = 2.</p>"
+            "smithy.api#documentation": "<p>The number of replicas in other AZs to provision on the new graph after import. Default = 0, Min = 0, Max = 2.</p>\n         <important>\n            <p>\n        Additional charges equivalent to the m-NCUs selected for the graph apply for each replica.\n      </p>\n         </important>"
           }
         },
         "deletionProtection": {
@@ -5602,7 +5602,7 @@
         "replicaCount": {
           "target": "com.amazonaws.neptunegraph#ReplicaCount",
           "traits": {
-            "smithy.api#documentation": "<p>The number of replicas in other AZs. Min =0, Max = 2, Default =1</p>"
+            "smithy.api#documentation": "<p>The number of replicas in other AZs. Min =0, Max = 2, Default =1</p>\n         <important>\n            <p>\n        Additional charges equivalent to the m-NCUs selected for the graph apply for each replica.\n      </p>\n         </important>"
           }
         },
         "publicConnectivity": {