diff --git a/CHANGELOG.md b/CHANGELOG.md
index b63c1c14..76dbe778 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -81,6 +81,7 @@ Inspired from [Keep a Changelog](https://keepachangelog.com/en/1.0.0/)
 - Added 404 responses to `/_alias/{name}` and `/{index}/_alias/{name}` ([#519](https://github.com/opensearch-project/opensearch-api-specification/pull/519))
 - Added `asynchronous_search` ([#525](https://github.com/opensearch-project/opensearch-api-specification/pull/525))
 - Added `DELETE /_plugins/_ml/tasks/{task_id}` ([#530](https://github.com/opensearch-project/opensearch-api-specification/pull/530))
+- Added `AwarenessAttributeStats` to `/_cluster/health` ([#534](https://github.com/opensearch-project/opensearch-api-specification/pull/534))
 
 ### Changed
 
diff --git a/spec/schemas/cluster.health.yaml b/spec/schemas/cluster.health.yaml
index a479ca95..2daf6d10 100644
--- a/spec/schemas/cluster.health.yaml
+++ b/spec/schemas/cluster.health.yaml
@@ -17,11 +17,25 @@ components:
           type: number
         active_shards_percent_as_number:
           $ref: '_common.yaml#/components/schemas/Percentage'
+        awareness_attributes:
+          description: Cluster health information for each awareness attribute.
+          type: object
+          x-version-added: '2.5'
+          additionalProperties:
+            $ref: '#/components/schemas/AwarenessAttributeStats'
         cluster_name:
           $ref: '_common.yaml#/components/schemas/Name'
         delayed_unassigned_shards:
           description: The number of shards whose allocation has been delayed by the timeout settings.
           type: number
+        discovered_master:
+          description: True if the master node has been discovered.
+          type: boolean
+          x-version-deprecated: 2
+        discovered_cluster_manager:
+          description: True if the cluster manager node has been discovered.
+          type: boolean
+          x-version-added: 2
         indices:
           type: object
           additionalProperties:
@@ -51,7 +65,7 @@ components:
         task_max_waiting_in_queue_millis:
           $ref: '_common.yaml#/components/schemas/DurationValueUnitMillis'
         timed_out:
-          description: If false the response returned within the period of time that is specified by the timeout parameter (30s by default)
+          description: If false the response returned within the period of time that is specified by the timeout parameter (30s by default).
           type: boolean
         unassigned_shards:
           description: The number of shards that are not allocated.
@@ -111,6 +125,22 @@ components:
         - cluster
         - indices
         - shards
+    AwarenessAttributeStats:
+      type: object
+      x-version-added: '2.5'
+      properties:
+        active_shards:
+          type: number
+        initializing_shards:
+          type: number
+        relocating_shards:
+          type: number
+        unassigned_shards:
+          type: number
+        data_nodes:
+          type: number
+        weight:
+          type: number
     ShardHealthStats:
       type: object
       properties:
diff --git a/tests/default/cluster/health.yaml b/tests/default/cluster/health.yaml
new file mode 100644
index 00000000..3d00ab37
--- /dev/null
+++ b/tests/default/cluster/health.yaml
@@ -0,0 +1,28 @@
+$schema: ../../../json_schemas/test_story.schema.yaml
+
+description: Test cluster health.
+chapters:
+  - synopsis: Returns a simple status of the health of the cluster.
+    path: /_cluster/health
+    method: GET
+    parameters:
+      expand_wildcards: all
+      level: cluster
+      local: false
+      timeout: 10s
+      wait_for_active_shards: 0
+      wait_for_nodes: <2
+      wait_for_events: normal
+      wait_for_no_relocating_shards: false
+      wait_for_no_initializing_shards: false
+    response:
+      status: 200
+  - synopsis: Returns a status of the health of the cluster with awareness.
+    version: '>= 2.5'
+    path: /_cluster/health
+    method: GET
+    parameters:
+      level: awareness_attributes
+      awareness_attribute: zone
+    response:
+      status: 200
diff --git a/tests/default/cluster/health/index.yaml b/tests/default/cluster/health/index.yaml
new file mode 100644
index 00000000..b9428ade
--- /dev/null
+++ b/tests/default/cluster/health/index.yaml
@@ -0,0 +1,29 @@
+$schema: ../../../../json_schemas/test_story.schema.yaml
+
+description: Test cluster health for an index.
+prologues:
+  - path: /{index}
+    method: PUT
+    parameters:
+      index: books
+epilogues:
+  - path: /books
+    method: DELETE
+    status: [200, 404]
+chapters:
+  - synopsis: Returns a status of the health of the cluster for a given index.
+    path: /_cluster/health/{index}
+    method: GET
+    parameters:
+      index: books
+      expand_wildcards: all
+      level: cluster
+      local: false
+      timeout: 10s
+      wait_for_active_shards: 0
+      wait_for_nodes: <2
+      wait_for_events: normal
+      wait_for_no_relocating_shards: false
+      wait_for_no_initializing_shards: false
+    response:
+      status: 200