diff --git a/openedx/core/djangoapps/content/search/api.py b/openedx/core/djangoapps/content/search/api.py
index 71d09590d003..8a40f0009dfc 100644
--- a/openedx/core/djangoapps/content/search/api.py
+++ b/openedx/core/djangoapps/content/search/api.py
@@ -34,6 +34,7 @@
     searchable_doc_for_course_block,
     searchable_doc_for_collection,
     searchable_doc_for_library_block,
+    searchable_doc_for_usage_key,
     searchable_doc_collections,
     searchable_doc_tags,
     searchable_doc_tags_for_collection,
diff --git a/openedx/core/djangoapps/content/search/documents.py b/openedx/core/djangoapps/content/search/documents.py
index f9041468c296..dc2a7702444b 100644
--- a/openedx/core/djangoapps/content/search/documents.py
+++ b/openedx/core/djangoapps/content/search/documents.py
@@ -112,6 +112,15 @@ def _meili_access_id_from_context_key(context_key: LearningContextKey) -> int:
     return access.id
 
 
+def searchable_doc_for_usage_key(usage_key: UsageKey) -> dict:
+    """
+    Generates a base document identified by its usage key.
+    """
+    return {
+        Fields.id: meili_id_from_opaque_key(usage_key),
+    }
+
+
 def _fields_from_block(block) -> dict:
     """
     Given an XBlock instance, call its index_dictionary() method to load any
@@ -297,14 +306,14 @@ def searchable_doc_for_library_block(xblock_metadata: lib_api.LibraryXBlockMetad
     library_name = lib_api.get_library(xblock_metadata.usage_key.context_key).title
     block = xblock_api.load_block(xblock_metadata.usage_key, user=None)
 
-    doc = {
-        Fields.id: meili_id_from_opaque_key(xblock_metadata.usage_key),
+    doc = searchable_doc_for_usage_key(xblock_metadata.usage_key)
+    doc.update({
         Fields.type: DocType.library_block,
         Fields.breadcrumbs: [],
         Fields.created: xblock_metadata.created.timestamp(),
         Fields.modified: xblock_metadata.modified.timestamp(),
         Fields.last_published: xblock_metadata.last_published.timestamp() if xblock_metadata.last_published else None,
-    }
+    })
 
     doc.update(_fields_from_block(block))
 
@@ -319,9 +328,7 @@ def searchable_doc_tags(usage_key: UsageKey) -> dict:
     Generate a dictionary document suitable for ingestion into a search engine
     like Meilisearch or Elasticsearch, with the tags data for the given content object.
     """
-    doc = {
-        Fields.id: meili_id_from_opaque_key(usage_key),
-    }
+    doc = searchable_doc_for_usage_key(usage_key)
     doc.update(_tags_for_content_object(usage_key))
 
     return doc
@@ -332,9 +339,7 @@ def searchable_doc_collections(usage_key: UsageKey) -> dict:
     Generate a dictionary document suitable for ingestion into a search engine
     like Meilisearch or Elasticsearch, with the collections data for the given content object.
     """
-    doc = {
-        Fields.id: meili_id_from_opaque_key(usage_key),
-    }
+    doc = searchable_doc_for_usage_key(usage_key)
     doc.update(_collections_for_content_object(usage_key))
 
     return doc
@@ -348,15 +353,11 @@ def searchable_doc_tags_for_collection(
     Generate a dictionary document suitable for ingestion into a search engine
     like Meilisearch or Elasticsearch, with the tags data for the given library collection.
     """
-    doc = {
-        Fields.id: collection.id,
-    }
-
     collection_usage_key = lib_api.get_library_collection_usage_key(
         library_key,
         collection.key,
     )
-
+    doc = searchable_doc_for_usage_key(collection_usage_key)
     doc.update(_tags_for_content_object(collection_usage_key))
 
     return doc
@@ -368,44 +369,42 @@ def searchable_doc_for_course_block(block) -> dict:
     like Meilisearch or Elasticsearch, so that the given course block can be
     found using faceted search.
     """
-    doc = {
-        Fields.id: meili_id_from_opaque_key(block.usage_key),
+    doc = searchable_doc_for_usage_key(block.usage_key)
+    doc.update({
         Fields.type: DocType.course_block,
-    }
+    })
 
     doc.update(_fields_from_block(block))
 
     return doc
 
 
-def searchable_doc_for_collection(collection) -> dict:
+def searchable_doc_for_collection(
+    library_key: LibraryLocatorV2,
+    collection_key: str,
+    *,
+    # Optionally provide the collection if we've already fetched one
+    collection: Collection | None = None,
+) -> dict:
     """
     Generate a dictionary document suitable for ingestion into a search engine
     like Meilisearch or Elasticsearch, so that the given collection can be
     found using faceted search.
     """
-    doc = {
-        Fields.id: collection.id,
-        Fields.block_id: collection.key,
-        Fields.type: DocType.collection,
-        Fields.display_name: collection.title,
-        Fields.description: collection.description,
-        Fields.created: collection.created.timestamp(),
-        Fields.modified: collection.modified.timestamp(),
-        # Add related learning_package.key as context_key by default.
-        # If related contentlibrary is found, it will override this value below.
-        # Mostly contentlibrary.library_key == learning_package.key
-        Fields.context_key: collection.learning_package.key,
-        Fields.num_children: collection.entities.count(),
-    }
-    # Just in case learning_package is not related to a library
+    collection_usage_key = lib_api.get_library_collection_usage_key(
+        library_key,
+        collection_key,
+    )
+
+    doc = searchable_doc_for_usage_key(collection_usage_key)
+
     try:
         context_key = collection.learning_package.contentlibrary.library_key
         org = str(context_key.org)
         doc.update({
             Fields.context_key: str(context_key),
             Fields.org: org,
-            Fields.usage_key: str(lib_api.get_library_collection_usage_key(context_key, collection.key)),
+            Fields.usage_key: str(collection_usage_key),
         })
     except LearningPackage.contentlibrary.RelatedObjectDoesNotExist:
         log.warning(f"Related library not found for {collection}")
diff --git a/openedx/core/djangoapps/content/search/tests/test_api.py b/openedx/core/djangoapps/content/search/tests/test_api.py
index 4aa41a156dab..0ac75f4f45b6 100644
--- a/openedx/core/djangoapps/content/search/tests/test_api.py
+++ b/openedx/core/djangoapps/content/search/tests/test_api.py
@@ -187,7 +187,7 @@ def setUp(self):
             )
             self.collection_usage_key = "lib-collection:org1:lib:MYCOL"
         self.collection_dict = {
-            "id": self.collection.id,
+            "id": "lib-collectionorg1libmycol-5b647617",
             "block_id": self.collection.key,
             "usage_key": self.collection_usage_key,
             "type": "collection",
@@ -461,7 +461,7 @@ def test_index_library_block_and_collections(self, mock_meilisearch):
         # Build expected docs at each stage
         lib_access, _ = SearchAccess.objects.get_or_create(context_key=self.library.key)
         doc_collection1_created = {
-            "id": collection1.id,
+            "id": "lib-collectionorg1libcol1-283a79c9",
             "block_id": collection1.key,
             "usage_key": f"lib-collection:org1:lib:{collection1.key}",
             "type": "collection",
@@ -476,7 +476,7 @@ def test_index_library_block_and_collections(self, mock_meilisearch):
             "breadcrumbs": [{"display_name": "Library"}],
         }
         doc_collection2_created = {
-            "id": collection2.id,
+            "id": "lib-collectionorg1libcol2-46823d4d",
             "block_id": collection2.key,
             "usage_key": f"lib-collection:org1:lib:{collection2.key}",
             "type": "collection",
@@ -491,7 +491,7 @@ def test_index_library_block_and_collections(self, mock_meilisearch):
             "breadcrumbs": [{"display_name": "Library"}],
         }
         doc_collection2_updated = {
-            "id": collection2.id,
+            "id": "lib-collectionorg1libcol2-46823d4d",
             "block_id": collection2.key,
             "usage_key": f"lib-collection:org1:lib:{collection2.key}",
             "type": "collection",
@@ -506,7 +506,7 @@ def test_index_library_block_and_collections(self, mock_meilisearch):
             "breadcrumbs": [{"display_name": "Library"}],
         }
         doc_collection1_updated = {
-            "id": collection1.id,
+            "id": "lib-collectionorg1libcol1-283a79c9",
             "block_id": collection1.key,
             "usage_key": f"lib-collection:org1:lib:{collection1.key}",
             "type": "collection",
@@ -593,14 +593,14 @@ def test_index_tags_in_collections(self, mock_meilisearch):
 
         # Build expected docs with tags at each stage
         doc_collection_with_tags1 = {
-            "id": self.collection.id,
+            "id": "lib-collectionorg1libmycol-5b647617",
             "tags": {
                 'taxonomy': ['A'],
                 'level0': ['A > one', 'A > two']
             }
         }
         doc_collection_with_tags2 = {
-            "id": self.collection.id,
+            "id": "lib-collectionorg1libmycol-5b647617",
             "tags": {
                 'taxonomy': ['A', 'B'],
                 'level0': ['A > one', 'A > two', 'B > four', 'B > three']
diff --git a/openedx/core/djangoapps/content/search/tests/test_documents.py b/openedx/core/djangoapps/content/search/tests/test_documents.py
index 9d51bd127bb4..f51f8e076e12 100644
--- a/openedx/core/djangoapps/content/search/tests/test_documents.py
+++ b/openedx/core/djangoapps/content/search/tests/test_documents.py
@@ -303,7 +303,7 @@ def test_collection_with_library(self):
         doc.update(searchable_doc_tags_for_collection(self.library.key, self.collection))
 
         assert doc == {
-            "id": self.collection.id,
+            "id": "lib-collectionedx2012_falltoy_collection-d1d907a4",
             "block_id": self.collection.key,
             "usage_key": self.collection_usage_key,
             "type": "collection",