diff --git a/litellm/integrations/otel/logger.py b/litellm/integrations/otel/logger.py
index 107532f6b55..2353472aefa 100644
--- a/litellm/integrations/otel/logger.py
+++ b/litellm/integrations/otel/logger.py
@@ -939,7 +939,10 @@ def fan_out_provider() -> ApiTracerProvider:
     if published is not None:
         return published
     logger: Final = _registered_v2_logger()
-    return logger.tracer_provider if logger is not None else get_tracer_provider()
+    if logger is not None:
+        attach_tenant_fan_out(logger.tracer_provider, logger.config)
+        return logger.tracer_provider
+    return get_tracer_provider()
 
 
 @contextmanager
diff --git a/tests/test_litellm/integrations/otel/test_otel_v2_destinations.py b/tests/test_litellm/integrations/otel/test_otel_v2_destinations.py
index ec8834f5ec7..fbda890da88 100644
--- a/tests/test_litellm/integrations/otel/test_otel_v2_destinations.py
+++ b/tests/test_litellm/integrations/otel/test_otel_v2_destinations.py
@@ -706,7 +706,7 @@ class TestProviderWiring:
         assert fan_out_provider() is v2.tracer_provider
         assert deliverable_destinations((LANGFUSE_DEST,), fan_out_provider()) == (LANGFUSE_DEST,)
 
-    def test_without_a_publish_anchoring_uses_a_registered_v2_logger(self, monkeypatch):
+    def test_without_a_publish_anchoring_attaches_fan_out_to_registered_v2_logger(self, monkeypatch):
         from litellm.proxy import proxy_server
 
         config = OpenTelemetryV2Config(exporters=[ExporterSpec(kind="in_memory", owner=ExporterOwner.LANGFUSE_OTEL)])
@@ -714,6 +714,7 @@ class TestProviderWiring:
         monkeypatch.setattr(proxy_server, "open_telemetry_logger", logger)
 
         assert fan_out_provider() is logger.tracer_provider
+        assert deliverable_destinations((LANGFUSE_DEST,), fan_out_provider()) == (LANGFUSE_DEST,)
 
     def test_without_a_publish_anchoring_falls_back_to_the_otel_global(self, monkeypatch):
         from opentelemetry import trace