diff --git a/sdk/cosmosdb/cosmos/changelog.md b/sdk/cosmosdb/cosmos/changelog.md
index eb194d9d86b3..f4fefb356281 100644
--- a/sdk/cosmosdb/cosmos/changelog.md
+++ b/sdk/cosmosdb/cosmos/changelog.md
@@ -1,3 +1,7 @@
+## 3.4.3
+
+- Makes changeFeed options optional. Fixes #6232 (#6273)
+
 ## 3.4.2
 
 - Fixes bug where the query may throw a 410 error during a split operation. Instead, throw 503 (#6074)
diff --git a/sdk/cosmosdb/cosmos/review/cosmos.api.md b/sdk/cosmosdb/cosmos/review/cosmos.api.md
index 87e6e26e2190..3db752ccb9c5 100644
--- a/sdk/cosmosdb/cosmos/review/cosmos.api.md
+++ b/sdk/cosmosdb/cosmos/review/cosmos.api.md
@@ -38,7 +38,7 @@ export interface ConflictDefinition {
     operationType?: OperationType;
     resourceId?: string;
     // Warning: (ae-forgotten-export) The symbol "ResourceType" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     resourceType?: ResourceType;
 }
@@ -261,7 +261,7 @@ export class Container {
     // @deprecated
     getPartitionKeyDefinition(): Promise<ResourceResponse<PartitionKeyDefinition>>;
     // Warning: (ae-forgotten-export) The symbol "PartitionedQueryExecutionInfo" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     getQueryPlan(query: string | SqlQuerySpec): Promise<Response<PartitionedQueryExecutionInfo>>;
     // (undocumented)
@@ -327,7 +327,7 @@ export interface CosmosClientOptions {
     connectionPolicy?: ConnectionPolicy;
     consistencyLevel?: keyof typeof ConsistencyLevel;
     // Warning: (ae-forgotten-export) The symbol "CosmosHeaders" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     defaultHeaders?: CosmosHeaders_2;
     endpoint: string;
@@ -432,7 +432,7 @@ export interface ErrorResponse extends Error {
     // (undocumented)
     activityId?: string;
     // Warning: (ae-forgotten-export) The symbol "ErrorBody" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     body?: ErrorBody;
     // (undocumented)
@@ -451,7 +451,7 @@ export interface ErrorResponse extends Error {
 export function extractPartitionKey(document: any, partitionKeyDefinition: PartitionKeyDefinition): PartitionKey[];
 
 // Warning: (ae-forgotten-export) The symbol "SharedOptions" needs to be exported by the entry point index.d.ts
-// 
+//
 // @public
 export interface FeedOptions extends SharedOptions {
     accessCondition?: {
@@ -569,18 +569,18 @@ export class Items {
     readonly container: Container;
     create<T extends ItemDefinition = any>(body: T, options?: RequestOptions): Promise<ItemResponse<T>>;
     query(query: string | SqlQuerySpec, options?: FeedOptions): QueryIterator<any>;
-    query<T>(query: string | SqlQuerySpec, options: FeedOptions): QueryIterator<T>;
+    query<T>(query: string | SqlQuerySpec, options?: FeedOptions): QueryIterator<T>;
     readAll(options?: FeedOptions): QueryIterator<ItemDefinition>;
     readAll<T extends ItemDefinition>(options?: FeedOptions): QueryIterator<T>;
     // Warning: (ae-forgotten-export) The symbol "ChangeFeedOptions" needs to be exported by the entry point index.d.ts
     // Warning: (ae-forgotten-export) The symbol "ChangeFeedIterator" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // @deprecated
-    readChangeFeed(partitionKey: string | number | boolean, changeFeedOptions: ChangeFeedOptions): ChangeFeedIterator<any>;
+    readChangeFeed(partitionKey: string | number | boolean, changeFeedOptions?: ChangeFeedOptions): ChangeFeedIterator<any>;
     // @deprecated
     readChangeFeed(changeFeedOptions?: ChangeFeedOptions): ChangeFeedIterator<any>;
     // @deprecated
-    readChangeFeed<T>(partitionKey: string | number | boolean, changeFeedOptions: ChangeFeedOptions): ChangeFeedIterator<T>;
+    readChangeFeed<T>(partitionKey: string | number | boolean, changeFeedOptions?: ChangeFeedOptions): ChangeFeedIterator<T>;
     // @deprecated
     readChangeFeed<T>(changeFeedOptions?: ChangeFeedOptions): ChangeFeedIterator<T>;
     upsert(body: any, options?: RequestOptions): Promise<ItemResponse<ItemDefinition>>;
@@ -724,7 +724,7 @@ export enum PermissionMode {
 }
 
 // Warning: (ae-forgotten-export) The symbol "PermissionBody" needs to be exported by the entry point index.d.ts
-// 
+//
 // @public (undocumented)
 export class PermissionResponse extends ResourceResponse<PermissionDefinition & PermissionBody & Resource> {
     constructor(resource: PermissionDefinition & PermissionBody & Resource, headers: CosmosHeaders, statusCode: number, permission: Permission);
@@ -883,17 +883,17 @@ export interface RequestContext {
     // (undocumented)
     endpoint?: string;
     // Warning: (ae-forgotten-export) The symbol "GlobalEndpointManager" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     globalEndpointManager: GlobalEndpointManager;
     // (undocumented)
     headers?: CosmosHeaders_2;
     // Warning: (ae-forgotten-export) The symbol "LocationRouting" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     locationRouting?: LocationRouting;
     // Warning: (ae-forgotten-export) The symbol "HTTPMethod" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     method: HTTPMethod;
     // (undocumented)
@@ -975,11 +975,11 @@ export class ResourceResponse<TResource> {
     // (undocumented)
     readonly resource: TResource;
     // Warning: (ae-forgotten-export) The symbol "StatusCode" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     readonly statusCode: StatusCode;
     // Warning: (ae-forgotten-export) The symbol "SubStatusCode" needs to be exported by the entry point index.d.ts
-    // 
+    //
     // (undocumented)
     readonly substatus?: SubStatusCode;
 }
diff --git a/sdk/cosmosdb/cosmos/src/client/Item/Items.ts b/sdk/cosmosdb/cosmos/src/client/Item/Items.ts
index fa41c2edaf69..b1ad79769b97 100644
--- a/sdk/cosmosdb/cosmos/src/client/Item/Items.ts
+++ b/sdk/cosmosdb/cosmos/src/client/Item/Items.ts
@@ -72,7 +72,7 @@ export class Items {
    * const {result: items} = await items.query<{firstName: string}>(querySpec).fetchAll();
    * ```
    */
-  public query<T>(query: string | SqlQuerySpec, options: FeedOptions): QueryIterator<T>;
+  public query<T>(query: string | SqlQuerySpec, options?: FeedOptions): QueryIterator<T>;
   public query<T>(query: string | SqlQuerySpec, options: FeedOptions = {}): QueryIterator<T> {
     const path = getPathFromLink(this.container.url, ResourceType.item);
     const id = getIdFromLink(this.container.url);