diff --git a/litellm/proxy/auth/auth_exception_handler.py b/litellm/proxy/auth/auth_exception_handler.py
index d41ee2d9bf..268e3bb1b2 100644
--- a/litellm/proxy/auth/auth_exception_handler.py
+++ b/litellm/proxy/auth/auth_exception_handler.py
@@ -68,6 +68,7 @@ class UserAPIKeyAuthExceptionHandler:
                 key_name="failed-to-connect-to-db",
                 token="failed-to-connect-to-db",
                 user_id=litellm_proxy_admin_name,
+                request_route=route,
             )
         else:
             # raise the exception to the caller
diff --git a/tests/litellm/proxy/auth/test_auth_exception_handler.py b/tests/litellm/proxy/auth/test_auth_exception_handler.py
index 224bf24b57..3e780c6ee9 100644
--- a/tests/litellm/proxy/auth/test_auth_exception_handler.py
+++ b/tests/litellm/proxy/auth/test_auth_exception_handler.py
@@ -2,7 +2,7 @@ import asyncio
 import json
 import os
 import sys
-from unittest.mock import MagicMock, patch
+from unittest.mock import AsyncMock, MagicMock, patch
 
 import pytest
 from fastapi import HTTPException, Request, status
@@ -110,3 +110,45 @@ async def test_handle_authentication_error_budget_exceeded():
         )
 
     assert exc_info.value.type == ProxyErrorTypes.budget_exceeded
+
+
+@pytest.mark.asyncio
+async def test_route_passed_to_post_call_failure_hook():
+    """
+    This route is used by proxy track_cost_callback's async_post_call_failure_hook to check if the route is an LLM route
+    """
+    handler = UserAPIKeyAuthExceptionHandler()
+
+    # Mock request and other dependencies
+    mock_request = MagicMock()
+    mock_request_data = {}
+    test_route = "/custom/route"
+    mock_span = None
+    mock_api_key = "test-key"
+
+    # Mock proxy_logging_obj.post_call_failure_hook
+    with patch(
+        "litellm.proxy.proxy_server.proxy_logging_obj.post_call_failure_hook",
+        new_callable=AsyncMock,
+    ) as mock_post_call_failure_hook:
+        # Test with DB connection error
+        with patch(
+            "litellm.proxy.proxy_server.general_settings",
+            {"allow_requests_on_db_unavailable": False},
+        ):
+            try:
+                await handler._handle_authentication_error(
+                    PrismaError(),
+                    mock_request,
+                    mock_request_data,
+                    test_route,
+                    mock_span,
+                    mock_api_key,
+                )
+            except Exception as e:
+                pass
+            asyncio.sleep(1)
+            # Verify post_call_failure_hook was called with the correct route
+            mock_post_call_failure_hook.assert_called_once()
+            call_args = mock_post_call_failure_hook.call_args[1]
+            assert call_args["user_api_key_dict"].request_route == test_route