diff --git a/litellm/types/litellm_params.py b/litellm/types/litellm_params.py
index 9f63d27f5f3..0cd54cf2af5 100644
--- a/litellm/types/litellm_params.py
+++ b/litellm/types/litellm_params.py
@@ -347,6 +347,7 @@ class CallState:
     model_alias_map: Mapping[str, str] | None = None
     data_residency: str | None = None
     litellm_logging_obj: "Logging | None" = None
+    parent_otel_span: object | None = None
     preset_cache_key: str | None = None
     cache_key: str | None = None
     stream_response: "Mapping[str, ModelResponse] | None" = None
diff --git a/tests/unit/caching/test_caching.py b/tests/unit/caching/test_caching.py
index 0911d5ef888..bc391511759 100644
--- a/tests/unit/caching/test_caching.py
+++ b/tests/unit/caching/test_caching.py
@@ -454,6 +454,24 @@ def test_provider_specific_cache_key_ignores_litellm_owned_kwargs(monkeypatch: p
     assert cache.get_cache_key(**{**request, "top_k": 6}) != base_key
 
 
+def test_get_cache_key_ignores_parent_otel_span_when_provider_optional_params_are_cached() -> None:
+    previous: Final = litellm.enable_caching_on_provider_specific_optional_params
+    litellm.enable_caching_on_provider_specific_optional_params = True
+    try:
+        cache: Final = Cache(type=LiteLLMCacheType.LOCAL)
+        messages: Final = [{"role": "user", "content": "hi"}]
+        span_a: Final = object()
+        span_b: Final = object()
+        key_with_span_a: Final = cache.get_cache_key(model="gpt-4.1-mini", messages=messages, parent_otel_span=span_a)
+        key_with_span_b: Final = cache.get_cache_key(model="gpt-4.1-mini", messages=messages, parent_otel_span=span_b)
+
+        assert key_with_span_a == key_with_span_b
+        assert key_with_span_a == cache.get_cache_key(model="gpt-4.1-mini", messages=messages)
+        assert key_with_span_a != cache.get_cache_key(model="gpt-4.1-mini", messages=messages, top_k=3)
+    finally:
+        litellm.enable_caching_on_provider_specific_optional_params = previous
+
+
 def test_cache_key_tells_apart_requests_that_differ_only_in_continuation_token() -> None:
     cache: Final = Cache(type=LiteLLMCacheType.LOCAL)
     request: Final = {
diff --git a/tests/unit/types/test_litellm_params.py b/tests/unit/types/test_litellm_params.py
index d71791b6f11..67b7935ade5 100644
--- a/tests/unit/types/test_litellm_params.py
+++ b/tests/unit/types/test_litellm_params.py
@@ -255,6 +255,7 @@ INTERNAL_STATE_NAMES: Final = (
     "model_alias_map",
     "data_residency",
     "litellm_logging_obj",
+    "parent_otel_span",
     "preset_cache_key",
     "cache_key",
     "stream_response",