diff --git a/litellm/integrations/opentelemetry.py b/litellm/integrations/opentelemetry.py
index 0d0e309034a..e146a53cfa3 100644
--- a/litellm/integrations/opentelemetry.py
+++ b/litellm/integrations/opentelemetry.py
@@ -117,6 +117,13 @@ class _FailureKwargsView(TypedDict, total=False):
 
 _JSON_OBJECT: Final = TypeAdapter(Mapping[str, object], config=ConfigDict(hide_input_in_errors=True))
 
+# Metadata keys dropped from spans when `litellm.redact_user_api_key_info` is set.
+_USER_API_KEY_METADATA_KEYS: Final = frozenset(
+    key
+    for key in StandardLoggingMetadata.__required_keys__ | StandardLoggingMetadata.__optional_keys__
+    if key.startswith("user_api_key")
+)
+
 
 def _text_as_stored_on_span(span: Span, key: str, text: str) -> str:
     from opentelemetry.sdk.trace import ReadableSpan
@@ -1549,6 +1556,8 @@ class OpenTelemetry(OTELGenAISemconvMixin, CustomLogger):
         in ``standard_logging_object.metadata``; propagating that to every
         span only adds noise that makes traces look mis-instrumented.
         """
+        if litellm.redact_user_api_key_info is True:
+            return
         if team_id:
             self.safe_set_attribute(
                 span=span,
@@ -2457,7 +2466,10 @@ class OpenTelemetry(OTELGenAISemconvMixin, CustomLogger):
             metadata: Final = cast(  # cast-ok: payload metadata follows the standard logging contract
                 StandardLoggingMetadata, standard_logging_payload["metadata"]
             )
+            redact_user_api_key_info: Final = litellm.redact_user_api_key_info is True
             for key, value in metadata.items():
+                if redact_user_api_key_info and key in _USER_API_KEY_METADATA_KEYS:
+                    continue
                 self.safe_set_attribute(
                     span=span,
                     key=f"metadata.{key}",
diff --git a/tests/unit/integrations/test_opentelemetry_redaction.py b/tests/unit/integrations/test_opentelemetry_redaction.py
new file mode 100644
index 00000000000..e307a06b100
--- /dev/null
+++ b/tests/unit/integrations/test_opentelemetry_redaction.py
@@ -0,0 +1,63 @@
+"""Regression tests for ``redact_user_api_key_info`` in OTEL spans (#36758)."""
+
+from unittest.mock import MagicMock
+
+import pytest
+
+import litellm
+from litellm.integrations.opentelemetry import OpenTelemetry
+
+_USER_API_KEY_METADATA = {
+    "user_api_key_hash": "hashed-secret",
+    "user_api_key_user_id": "uid-123",
+    "user_api_key_user_email": "user@example.com",
+    "user_api_key_team_id": "team-456",
+}
+
+
+def _metadata_attribute_keys(redact: bool, monkeypatch: pytest.MonkeyPatch) -> list[str]:
+    monkeypatch.setattr(litellm, "redact_user_api_key_info", redact)
+    otel_logger = OpenTelemetry()
+    otel_logger.safe_set_attribute = MagicMock()
+    otel_logger._set_inference_identity_attributes = MagicMock()
+    otel_logger._set_service_tier_attributes = MagicMock()
+    otel_logger._capture_in_span = MagicMock(return_value=False)
+
+    otel_logger.set_attributes(
+        span=MagicMock(),
+        kwargs={
+            "litellm_params": {"custom_llm_provider": "openai"},
+            "standard_logging_object": {
+                "call_type": "completion",
+                "metadata": {**_USER_API_KEY_METADATA, "generation_name": "test-gen"},
+            },
+        },
+        response_obj=None,
+    )
+    return [call.kwargs["key"] for call in otel_logger.safe_set_attribute.call_args_list]
+
+
+def test_set_attributes_drops_user_api_key_metadata_when_redaction_enabled(monkeypatch):
+    attribute_keys = _metadata_attribute_keys(redact=True, monkeypatch=monkeypatch)
+
+    assert "metadata.generation_name" in attribute_keys
+    for key in _USER_API_KEY_METADATA:
+        assert f"metadata.{key}" not in attribute_keys
+
+
+def test_set_attributes_keeps_user_api_key_metadata_when_redaction_disabled(monkeypatch):
+    attribute_keys = _metadata_attribute_keys(redact=False, monkeypatch=monkeypatch)
+
+    for key in _USER_API_KEY_METADATA:
+        assert f"metadata.{key}" in attribute_keys
+
+
+@pytest.mark.parametrize("redact, expected_calls", [(True, 0), (False, 2)])
+def test_team_attributes_on_child_spans_respect_redaction(monkeypatch, redact, expected_calls):
+    monkeypatch.setattr(litellm, "redact_user_api_key_info", redact)
+    otel_logger = OpenTelemetry()
+    otel_logger.safe_set_attribute = MagicMock()
+
+    otel_logger._set_team_attributes_on_span(span=MagicMock(), team_id="team-456", team_alias="team-alias")
+
+    assert otel_logger.safe_set_attribute.call_count == expected_calls