diff --git a/app/models/indexed_file.rb b/app/models/indexed_file.rb
index 11d331a337..ac432b7993 100644
--- a/app/models/indexed_file.rb
+++ b/app/models/indexed_file.rb
@@ -1,11 +1,11 @@
 # Copyright 2011-2023, The Trustees of Indiana University and Northwestern
 #   University.  Licensed under the Apache License, Version 2.0 (the "License");
 #   you may not use this file except in compliance with the License.
-# 
+#
 # You may obtain a copy of the License at
-# 
+#
 # http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing, software distributed
 #   under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 #   CONDITIONS OF ANY KIND, either express or implied. See the License for the
diff --git a/app/presenters/speedy_af/proxy/indexed_file.rb b/app/presenters/speedy_af/proxy/indexed_file.rb
index 6e26220b36..04ca163d4b 100644
--- a/app/presenters/speedy_af/proxy/indexed_file.rb
+++ b/app/presenters/speedy_af/proxy/indexed_file.rb
@@ -1,11 +1,11 @@
 # Copyright 2011-2023, The Trustees of Indiana University and Northwestern
 #   University.  Licensed under the Apache License, Version 2.0 (the "License");
 #   you may not use this file except in compliance with the License.
-# 
+#
 # You may obtain a copy of the License at
-# 
+#
 # http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing, software distributed
 #   under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
 #   CONDITIONS OF ANY KIND, either express or implied. See the License for the
@@ -23,6 +23,10 @@ def content
     binary_content? ? Base64.decode64(attrs[:content]) : attrs[:content]
   end
 
+  def persisted?
+    id.present?
+  end
+
   def has_content?
     attrs[:content].present?
   end
diff --git a/config/initializers/presenter_config.rb b/config/initializers/presenter_config.rb
index 292782c712..d319e16be6 100644
--- a/config/initializers/presenter_config.rb
+++ b/config/initializers/presenter_config.rb
@@ -14,7 +14,8 @@
                         file_size: nil,
                         date_digitized: nil,
                         file_checksum: nil,
-                        supplemental_file_captions: []
+                        supplemental_file_captions: [],
+                        identifier: []
                       }
       include MasterFileIntercom
       include MasterFileBehavior
diff --git a/spec/controllers/media_objects_controller_spec.rb b/spec/controllers/media_objects_controller_spec.rb
index 83cf7a7aff..aaab3b9177 100644
--- a/spec/controllers/media_objects_controller_spec.rb
+++ b/spec/controllers/media_objects_controller_spec.rb
@@ -1249,6 +1249,28 @@
           get 'show', params: { id: media_object.id, format:'json' }
       	  expect(a_request(:any, /#{ActiveFedora.fedora.base_uri}/)).not_to have_been_made
       	end
+
+        context 'MO with identifier-less master file' do
+          let!(:media_object) { FactoryBot.create(:published_media_object, visibility: 'public') }
+          let!(:master_file) { FactoryBot.create(:master_file, :with_derivative, media_object: media_object, identifier: nil) }
+          it 'should not read from fedora' do
+            perform_enqueued_jobs(only: MediaObjectIndexingJob)
+            WebMock.reset_executed_requests!
+            get 'show', params: { id: media_object.id, format: 'json' }
+            expect(a_request(:any, /#{ActiveFedora.fedora.base_uri}/)).not_to have_been_made
+          end
+        end
+
+        context 'MO with master file containing IndexedFiles' do
+          let!(:media_object) { FactoryBot.create(:published_media_object, visibility: 'public') }
+          let!(:master_file) { FactoryBot.create(:master_file, :with_derivative, :with_thumbnail, :with_poster, :with_waveform, :with_captions, media_object: media_object, identifier: nil) }
+          it 'should not read from fedora' do
+            perform_enqueued_jobs(only: MediaObjectIndexingJob)
+            WebMock.reset_executed_requests!
+            get 'show', params: { id: media_object.id, format: 'json' }
+            expect(a_request(:any, /#{ActiveFedora.fedora.base_uri}/)).not_to have_been_made
+          end
+        end
       end
     end
 
@@ -1272,6 +1294,28 @@
         get 'show', params: { id: media_object.id }
         expect(a_request(:any, /#{ActiveFedora.fedora.base_uri}/)).not_to have_been_made
       end
+
+      context 'media object with identifier-less master file' do
+        let!(:media_object) { FactoryBot.create(:published_media_object, visibility: 'public') }
+        let!(:master_file) { FactoryBot.create(:master_file, :with_derivative, media_object: media_object, identifier: nil) }
+        it 'should not read from fedora' do
+          perform_enqueued_jobs(only: MediaObjectIndexingJob)
+          WebMock.reset_executed_requests!
+          get 'show', params: { id: media_object.id }
+          expect(a_request(:any, /#{ActiveFedora.fedora.base_uri}/)).not_to have_been_made
+        end
+      end
+
+      context 'media object with master file containing IndexedFiles' do
+        let!(:media_object) { FactoryBot.create(:published_media_object, visibility: 'public') }
+        let!(:master_file) { FactoryBot.create(:master_file, :with_derivative, :with_thumbnail, :with_poster, :with_waveform, :with_captions, media_object: media_object, identifier: nil) }
+        it 'should not read from fedora' do
+          perform_enqueued_jobs(only: MediaObjectIndexingJob)
+          WebMock.reset_executed_requests!
+          get 'show', params: { id: media_object.id }
+          expect(a_request(:any, /#{ActiveFedora.fedora.base_uri}/)).not_to have_been_made
+        end
+      end
     end
   end