diff --git a/docroot/modules/custom/ncids_html_transformer/src/Services/NcidsEmbeddedEntitiesTransformer.php b/docroot/modules/custom/ncids_html_transformer/src/Services/NcidsEmbeddedEntitiesTransformer.php
index babd4c3edd..3a26bdd9bb 100644
--- a/docroot/modules/custom/ncids_html_transformer/src/Services/NcidsEmbeddedEntitiesTransformer.php
+++ b/docroot/modules/custom/ncids_html_transformer/src/Services/NcidsEmbeddedEntitiesTransformer.php
@@ -70,6 +70,7 @@ public function transform(string $html): string {
             break;
 
           case 'view_mode:block_content.full':
+            $drupal_embed->setAttribute('data-embed-button', 'insert_content_block_content');
             break;
 
           default:
diff --git a/docroot/modules/custom/ncids_html_transformer/tests/src/Unit/NcidsEmbeddedEntitiesTransformerTest.php b/docroot/modules/custom/ncids_html_transformer/tests/src/Unit/NcidsEmbeddedEntitiesTransformerTest.php
index bfed3711b0..49b07f3a51 100644
--- a/docroot/modules/custom/ncids_html_transformer/tests/src/Unit/NcidsEmbeddedEntitiesTransformerTest.php
+++ b/docroot/modules/custom/ncids_html_transformer/tests/src/Unit/NcidsEmbeddedEntitiesTransformerTest.php
@@ -184,4 +184,32 @@ public function testExternalLinkBlockNoImageHtml() {
     $this->assertEquals($expected_html, $post_processed, 'Should transform external link blocks with new embed button for no image view mode.');
   }
 
+  /**
+   * Test content block migration with block_content.full.
+   *
+   * @covers ::transform
+   */
+  public function testContentBlock() {
+    $original_html =
+      '<drupal-entity ' .
+        'data-align="right" data-entity-type="block_content" ' .
+        'data-entity-uuid="e69980a2-d521-4f68-b7d8-98aa59921444" ' .
+        'data-embed-button="insert_block_content" ' .
+        'data-entity-embed-display="view_mode:block_content.full"' .
+      '>&nbsp;</drupal-entity>';
+    $expected_html =
+      '<drupal-entity ' .
+        'data-align="right" data-entity-type="block_content" ' .
+        'data-entity-uuid="e69980a2-d521-4f68-b7d8-98aa59921444" ' .
+        'data-embed-button="insert_content_block_content" ' .
+        'data-entity-embed-display="view_mode:block_content.full"' .
+      '>&nbsp;</drupal-entity>';
+
+    // Simulate full transformation process.
+    $pre_processed = $this->transformer->preProcessHtml($original_html);
+    $transformed = $this->transformer->transform($pre_processed);
+    $post_processed = $this->transformer->postProcessHtml($transformed);
+    $this->assertEquals($expected_html, $post_processed, 'Should transform content block.');
+  }
+
 }