diff --git a/litellm/litellm_core_utils/prompt_templates/factory.py b/litellm/litellm_core_utils/prompt_templates/factory.py
index 31612b8e78d..4990c7081b7 100644
--- a/litellm/litellm_core_utils/prompt_templates/factory.py
+++ b/litellm/litellm_core_utils/prompt_templates/factory.py
@@ -4741,7 +4741,9 @@ class BedrockConverseMessagesProcessor:
         source = element["source"]
         media_type: str = source["media_type"]
         data: str = source["data"]
-        doc_format = media_type.split("/")[1]
+        doc_format = BedrockImageProcessor._validate_format(
+            mime_type=media_type, image_format=media_type.split("/")[1]
+        )
 
         # Deterministic name using the same hashing pattern as _create_bedrock_block
         HASH_SAMPLE_BYTES = 64 * 1024
diff --git a/tests/test_litellm/litellm_core_utils/prompt_templates/test_litellm_core_utils_prompt_templates_factory.py b/tests/test_litellm/litellm_core_utils/prompt_templates/test_litellm_core_utils_prompt_templates_factory.py
index d6005f25da9..462d697e0a3 100644
--- a/tests/test_litellm/litellm_core_utils/prompt_templates/test_litellm_core_utils_prompt_templates_factory.py
+++ b/tests/test_litellm/litellm_core_utils/prompt_templates/test_litellm_core_utils_prompt_templates_factory.py
@@ -2444,9 +2444,11 @@ def test_bedrock_converse_messages_pt_document_various_formats():
         ("application/pdf", "pdf"),
         ("text/csv", "csv"),
         ("text/html", "html"),
+        ("text/plain", "txt"),
+        ("text/markdown", "md"),
         (
             "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
-            "vnd.openxmlformats-officedocument.wordprocessingml.document",
+            "docx",
         ),
     ]