diff --git a/litellm/litellm_core_utils/exception_mapping_utils.py b/litellm/litellm_core_utils/exception_mapping_utils.py
index 6d39f272f3e..53671f1d019 100644
--- a/litellm/litellm_core_utils/exception_mapping_utils.py
+++ b/litellm/litellm_core_utils/exception_mapping_utils.py
@@ -279,6 +279,54 @@ class _ProviderHTTPException(Protocol):
 _ERROR_BODY_ADAPTER: Final = TypeAdapter(dict[str, object])
 
 
+def _body_request_id(raw_body: object) -> str | None:
+    try:
+        body: Final = _ERROR_BODY_ADAPTER.validate_python(raw_body)
+    except ValidationError:
+        return None
+
+    body_request_id: Final = body.get("request_id")
+    if isinstance(body_request_id, str) and body_request_id:
+        return body_request_id
+
+    nested_error: Final = as_str_mapping(body.get("error"))
+    if nested_error is None:
+        return None
+    nested_request_id: Final = nested_error.get("request_id")
+    return nested_request_id if isinstance(nested_request_id, str) and nested_request_id else None
+
+
+def _get_error_request_id(error_obj: _ProviderHTTPException) -> str | None:
+    body_request_id: Final = _body_request_id(attribute_or_none(error_obj, "body"))
+    if body_request_id is not None:
+        return body_request_id
+
+    exception_request_id: Final = attribute_or_none(error_obj, "request_id")
+    if isinstance(exception_request_id, str) and exception_request_id:
+        return exception_request_id
+
+    response: Final = attribute_or_none(error_obj, "response")
+    if not isinstance(response, httpx.Response):
+        return None
+    try:
+        response_body: Final = _ERROR_BODY_ADAPTER.validate_json(response.content)
+    except (ValidationError, httpx.ResponseNotRead):
+        return None
+    return _body_request_id(response_body)
+
+
+def _get_error_message_with_request_id(error_obj: _ProviderHTTPException) -> str | None:
+    extracted_message: Final = get_error_message(error_obj=error_obj)
+    if extracted_message is None:
+        return None
+
+    request_id: Final = _get_error_request_id(error_obj)
+    if request_id is not None and request_id not in extracted_message:
+        return f"{extracted_message} (request_id: {request_id})"
+
+    return extracted_message
+
+
 def _openai_cyber_policy_body(original_exception: _ProviderHTTPException) -> Mapping[str, object] | None:
     raw_body: Final[object] = getattr(original_exception, "body", None)
     try:
@@ -341,7 +389,7 @@ def _map_openai_exception(
             body=dict(cyber_policy_body),
         )
     # custom_llm_provider is openai, make it OpenAI
-    message = get_error_message(error_obj=original_exception)
+    message = _get_error_message_with_request_id(error_obj=original_exception)
     if message is None:
         if hasattr(original_exception, "message"):
             message = original_exception.message
diff --git a/tests/unit/litellm_core_utils/test_exception_mapping_utils.py b/tests/unit/litellm_core_utils/test_exception_mapping_utils.py
index 32a99a37870..52c7f35b33d 100644
--- a/tests/unit/litellm_core_utils/test_exception_mapping_utils.py
+++ b/tests/unit/litellm_core_utils/test_exception_mapping_utils.py
@@ -9,6 +9,7 @@ import openai
 import pytest
 from fastapi import HTTPException
 from openai import AsyncOpenAI, OpenAI
+from pydantic import TypeAdapter
 
 import litellm
 from litellm import completion
@@ -16,6 +17,7 @@ from litellm.exceptions import GuardrailRaisedException
 from litellm.litellm_core_utils.exception_mapping_utils import (
     ExceptionCheckers,
     _get_body_error_code,
+    _get_error_message_with_request_id,
     _get_response_headers,
     exception_type,
     extract_and_raise_litellm_exception,
@@ -576,6 +578,155 @@ def test_openai_compatible_429_still_maps_to_rate_limit():
     assert excinfo.value.status_code == 429
 
 
+class _FakeErrorObj:
+    """Minimal stand-in for an SDK exception carrying a parsed error body."""
+
+    def __init__(self, body=None, request_id=None):
+        self.body = body
+        if request_id is not None:
+            self.request_id = request_id
+
+
+def test_error_message_with_request_id_appends_top_level_request_id():
+    """DashScope/Bailian returns `request_id` as a top-level sibling of
+    `error` in the response body. Extracting only `error.message` dropped it
+    from the final error text (issue #47839)."""
+    error_obj = _FakeErrorObj(
+        body={
+            "error": {
+                "message": "Incorrect API key provided.",
+                "type": "invalid_request_error",
+                "param": None,
+                "code": "invalid_api_key",
+            },
+            "request_id": "343604ce-3795-9363-8be6-f4aa3f4613ee",
+        }
+    )
+
+    assert _get_error_message_with_request_id(error_obj=error_obj) == (
+        "Incorrect API key provided. (request_id: 343604ce-3795-9363-8be6-f4aa3f4613ee)"
+    )
+
+
+def test_error_message_with_request_id_appends_request_id_for_flat_body():
+    error_obj = _FakeErrorObj(body={"message": "Something went wrong", "request_id": "req_flat_123"})
+
+    assert _get_error_message_with_request_id(error_obj=error_obj) == "Something went wrong (request_id: req_flat_123)"
+
+
+def test_error_message_with_request_id_appends_nested_error_request_id():
+    error_obj = _FakeErrorObj(body={"error": {"message": "Bad request", "request_id": "req_nested_456"}})
+
+    assert _get_error_message_with_request_id(error_obj=error_obj) == "Bad request (request_id: req_nested_456)"
+
+
+def test_error_message_with_request_id_with_non_dict_body_returns_none():
+    error_obj = _FakeErrorObj(body="not-a-dict")
+
+    assert _get_error_message_with_request_id(error_obj=error_obj) is None
+
+
+def test_error_message_with_request_id_without_request_id_is_unchanged():
+    error_obj = _FakeErrorObj(body={"error": {"message": "Plain error", "code": "some_code"}})
+
+    assert _get_error_message_with_request_id(error_obj=error_obj) == "Plain error"
+
+
+def test_error_message_with_request_id_does_not_duplicate_request_id():
+    error_obj = _FakeErrorObj(body={"message": "Failed (request_id: req_dup_1)", "request_id": "req_dup_1"})
+
+    assert _get_error_message_with_request_id(error_obj=error_obj) == "Failed (request_id: req_dup_1)"
+
+
+def test_error_message_includes_the_exception_request_id() -> None:
+    request_id: Final = "provider-request-from-exception"
+    original_exception: Final = _FakeErrorObj(body={"message": "Rejected request"}, request_id=request_id)
+
+    assert _get_error_message_with_request_id(original_exception) == f"Rejected request (request_id: {request_id})"
+
+
+@pytest.mark.parametrize("response_content", (b"not-json", b"[]", b'{"request_id": 42}', None))
+def test_error_message_survives_a_response_without_a_readable_request_id(response_content: bytes | None) -> None:
+    request: Final = httpx.Request("POST", "https://provider.example/v1/chat/completions")
+    response: Final = (
+        httpx.Response(401, request=request, content=response_content)
+        if response_content is not None
+        else httpx.Response(401, request=request, stream=httpx.ByteStream(b"unread"))
+    )
+    original_exception: Final = OpenAIError(
+        status_code=401, message="Rejected request", body={"message": "Rejected request"}, response=response
+    )
+
+    assert _get_error_message_with_request_id(original_exception) == "Rejected request"
+
+
+@pytest.mark.parametrize("include_request_id_header", (False, True))
+def test_dashscope_auth_error_keeps_request_id_from_the_sdk_response(include_request_id_header: bool) -> None:
+    request_id: Final = "provider-request-from-response"
+    message: Final = "Incorrect API key provided."
+    provider_body: Final = {"error": {"message": message, "type": "invalid_request_error"}, "request_id": request_id}
+
+    def reject_request(request: httpx.Request) -> httpx.Response:
+        return httpx.Response(
+            401,
+            request=request,
+            json=provider_body,
+            headers={"x-request-id": request_id} if include_request_id_header else {},
+        )
+
+    with (
+        httpx.Client(transport=httpx.MockTransport(reject_request)) as http_client,
+        OpenAI(api_key="unit-test-credential", http_client=http_client, max_retries=0) as client,
+        pytest.raises(openai.AuthenticationError) as sdk_error,
+    ):
+        client.chat.completions.create(model="test-model", messages=[{"role": "user", "content": "Hello"}])
+
+    original_exception: Final = OpenAIError(
+        status_code=sdk_error.value.status_code,
+        message=sdk_error.value.message,
+        response=sdk_error.value.response,
+        body=TypeAdapter(dict[str, object]).validate_python(sdk_error.value.body),
+    )
+
+    with pytest.raises(litellm.AuthenticationError) as mapped:
+        exception_type(model="test-model", original_exception=original_exception, custom_llm_provider="dashscope")
+
+    assert mapped.value.message.count(request_id) == 1
+    assert message in mapped.value.message
+
+
+def test_dashscope_auth_error_message_includes_provider_request_id():
+    """End-to-end (issue #47839): a DashScope 401 through the
+    OpenAI-compatible exception mapping must keep the provider request id
+    in the final AuthenticationError message."""
+    dashscope_body = {
+        "error": {
+            "message": "Incorrect API key provided. For details, see: "
+            "https://help.aliyun.com/zh/model-studio/error-code#apikey-error",
+            "type": "invalid_request_error",
+            "param": None,
+            "code": "invalid_api_key",
+        },
+        "request_id": "343604ce-3795-9363-8be6-f4aa3f4613ee",
+    }
+    original_exception = OpenAIError(
+        status_code=401,
+        message=f"Error code: 401 - {dashscope_body}",
+        headers={},
+        body=dashscope_body,
+    )
+
+    with pytest.raises(litellm.AuthenticationError) as excinfo:
+        exception_type(
+            model="dashscope/deepseek-v4-flash",
+            original_exception=original_exception,
+            custom_llm_provider="dashscope",
+        )
+
+    assert "343604ce-3795-9363-8be6-f4aa3f4613ee" in str(excinfo.value)
+    assert "Incorrect API key provided" in str(excinfo.value)
+
+
 @pytest.mark.parametrize(
     "error_message",
     [