diff --git a/src/strands/models/bedrock.py b/src/strands/models/bedrock.py
index 3fa907995..a48e810de 100644
--- a/src/strands/models/bedrock.py
+++ b/src/strands/models/bedrock.py
@@ -926,11 +926,14 @@ def _convert_non_streaming_to_streaming(self, response: dict[str, Any]) -> Itera
         yield {"messageStart": {"role": response["output"]["message"]["role"]}}
 
         # Process content blocks
-        for content in cast(list[ContentBlock], response["output"]["message"]["content"]):
-            # Yield contentBlockStart event if needed
+        for content_block_index, content in enumerate(
+            cast(list[ContentBlock], response["output"]["message"]["content"])
+        ):
+            # Yield contentBlockStart for all content block types to match streaming behavior
             if "toolUse" in content:
                 yield {
                     "contentBlockStart": {
+                        "contentBlockIndex": content_block_index,
                         "start": {
                             "toolUse": {
                                 "toolUseId": content["toolUse"]["toolUseId"],
@@ -945,14 +948,24 @@ def _convert_non_streaming_to_streaming(self, response: dict[str, Any]) -> Itera
 
                 yield {"contentBlockDelta": {"delta": {"toolUse": {"input": input_value}}}}
             elif "text" in content:
-                # Then yield the text as a delta
+                yield {
+                    "contentBlockStart": {
+                        "contentBlockIndex": content_block_index,
+                        "start": {},
+                    }
+                }
                 yield {
                     "contentBlockDelta": {
                         "delta": {"text": content["text"]},
                     }
                 }
             elif "reasoningContent" in content:
-                # Then yield the reasoning content as a delta
+                yield {
+                    "contentBlockStart": {
+                        "contentBlockIndex": content_block_index,
+                        "start": {},
+                    }
+                }
                 yield {
                     "contentBlockDelta": {
                         "delta": {"reasoningContent": {"text": content["reasoningContent"]["reasoningText"]["text"]}}
@@ -970,6 +983,12 @@ def _convert_non_streaming_to_streaming(self, response: dict[str, Any]) -> Itera
                         }
                     }
             elif "citationsContent" in content:
+                yield {
+                    "contentBlockStart": {
+                        "contentBlockIndex": content_block_index,
+                        "start": {},
+                    }
+                }
                 # For non-streaming citations, emit text and metadata deltas in sequence
                 # to match streaming behavior where they flow naturally
                 if "content" in content["citationsContent"]:
diff --git a/tests/strands/models/test_bedrock.py b/tests/strands/models/test_bedrock.py
index 66fe8ab00..2c121b9bb 100644
--- a/tests/strands/models/test_bedrock.py
+++ b/tests/strands/models/test_bedrock.py
@@ -1092,6 +1092,7 @@ async def test_stream_with_streaming_false(bedrock_client, alist, messages):
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"text": "test"}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "end_turn", "additionalModelResponseFields": None}},
@@ -1122,7 +1123,12 @@ async def test_stream_with_streaming_false_and_tool_use(bedrock_client, alist, m
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
-        {"contentBlockStart": {"start": {"toolUse": {"toolUseId": "123", "name": "dummyTool"}}}},
+        {
+            "contentBlockStart": {
+                "contentBlockIndex": 0,
+                "start": {"toolUse": {"toolUseId": "123", "name": "dummyTool"}},
+            }
+        },
         {"contentBlockDelta": {"delta": {"toolUse": {"input": '{"hello": "world!"}'}}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "tool_use", "additionalModelResponseFields": None}},
@@ -1159,6 +1165,7 @@ async def test_stream_with_streaming_false_and_reasoning(bedrock_client, alist,
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"reasoningContent": {"text": "Thinking really hard...."}}}},
         {"contentBlockDelta": {"delta": {"reasoningContent": {"signature": "123"}}}},
         {"contentBlockStop": {}},
@@ -1197,6 +1204,7 @@ async def test_stream_and_reasoning_no_signature(bedrock_client, alist, messages
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"reasoningContent": {"text": "Thinking really hard...."}}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "tool_use", "additionalModelResponseFields": None}},
@@ -1224,6 +1232,7 @@ async def test_stream_with_streaming_false_with_metrics_and_usage(bedrock_client
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"text": "test"}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "tool_use", "additionalModelResponseFields": None}},
@@ -1265,6 +1274,7 @@ async def test_stream_input_guardrails(bedrock_client, alist, messages):
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"text": "test"}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "end_turn", "additionalModelResponseFields": None}},
@@ -1316,6 +1326,7 @@ async def test_stream_output_guardrails(bedrock_client, alist, messages):
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"text": "test"}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "end_turn", "additionalModelResponseFields": None}},
@@ -1369,6 +1380,7 @@ async def test_stream_output_guardrails_redacts_output(bedrock_client, alist, me
     tru_events = await alist(response)
     exp_events = [
         {"messageStart": {"role": "assistant"}},
+        {"contentBlockStart": {"contentBlockIndex": 0, "start": {}}},
         {"contentBlockDelta": {"delta": {"text": "test"}}},
         {"contentBlockStop": {}},
         {"messageStop": {"stopReason": "end_turn", "additionalModelResponseFields": None}},