diff --git a/litellm/litellm_core_utils/streaming_chunk_builder_utils.py b/litellm/litellm_core_utils/streaming_chunk_builder_utils.py
index 67684a230e3..03de1884f92 100644
--- a/litellm/litellm_core_utils/streaming_chunk_builder_utils.py
+++ b/litellm/litellm_core_utils/streaming_chunk_builder_utils.py
@@ -391,6 +391,15 @@ class ChunkProcessor:
                 if chunk_finish_reason is not None:
                     finish_reason = chunk_finish_reason
 
+        choice_provider_specific_fields: Final[dict[str, object]] = {  # mutable-ok: response field requires a dict
+            key: value
+            for chunk in chunks
+            if chunk.get("choices")
+            for fields in (chunk["choices"][0].get("provider_specific_fields"),)
+            if isinstance(fields, dict)
+            for key, value in fields.items()
+        }
+
         # Initialize the response dictionary
         response = ModelResponse(
             **{
@@ -404,6 +413,7 @@ class ChunkProcessor:
                         "index": 0,
                         "message": {"role": role, "content": ""},
                         "finish_reason": finish_reason,
+                        "provider_specific_fields": choice_provider_specific_fields or None,
                     }
                 ],
                 "usage": {
diff --git a/tests/unit/llms/bedrock/chat/test_converse_transformation.py b/tests/unit/llms/bedrock/chat/test_converse_transformation.py
index 4d8a38882d3..19e67bf6a0a 100644
--- a/tests/unit/llms/bedrock/chat/test_converse_transformation.py
+++ b/tests/unit/llms/bedrock/chat/test_converse_transformation.py
@@ -4629,6 +4629,8 @@ def test_transform_response_native_structured_output():
     assert result.choices[0].finish_reason == "stop"
 
 
+# AWS Bedrock Converse stopReason values, accessed 2026-09-16:
+# https://docs.aws.amazon.com/bedrock/latest/APIReference/API_runtime_Converse.html
 @pytest.mark.parametrize("stop_reason", ("stop_sequence", "end_turn"))
 def test_transform_response_preserves_raw_bedrock_stop_reason(stop_reason: str):
     response_json = {
@@ -4670,6 +4672,8 @@ def test_transform_response_preserves_raw_bedrock_stop_reason(stop_reason: str):
     }
 
 
+# AWS Bedrock Converse stopReason values, accessed 2026-09-16:
+# https://docs.aws.amazon.com/bedrock/latest/APIReference/API_runtime_Converse.html
 @pytest.mark.parametrize("stop_reason", ("stop_sequence", "end_turn"))
 def test_converse_chunk_parser_preserves_raw_bedrock_stop_reason(stop_reason: str):
     result = AWSEventStreamDecoder(model="bedrock/claude").converse_chunk_parser(
@@ -4682,6 +4686,21 @@ def test_converse_chunk_parser_preserves_raw_bedrock_stop_reason(stop_reason: st
     }
 
 
+def test_converse_assembled_stream_preserves_raw_bedrock_stop_reason():
+    # AWS Bedrock Converse stopReason value, accessed 2026-09-16:
+    # https://docs.aws.amazon.com/bedrock/latest/APIReference/API_runtime_Converse.html
+    result = AWSEventStreamDecoder(model="bedrock/claude").converse_chunk_parser(
+        {"stopReason": "stop_sequence"}
+    )
+
+    assembled = litellm.stream_chunk_builder(chunks=[result])
+
+    assert assembled is not None
+    assert assembled.choices[0].provider_specific_fields == {
+        "native_finish_reason": "stop_sequence"
+    }
+
+
 def test_add_additional_properties_simple_object():
     """Object schemas without additionalProperties get it set to false."""
     schema = {