diff --git a/litellm/integrations/newrelic/newrelic.py b/litellm/integrations/newrelic/newrelic.py
index 8106465bc3b..f935ca5a22a 100644
--- a/litellm/integrations/newrelic/newrelic.py
+++ b/litellm/integrations/newrelic/newrelic.py
@@ -331,8 +331,14 @@ class NewRelicLogger(CustomLogger):
             return choices[0].get("finish_reason", "unknown")
         return "unknown"
 
+    def _to_epoch_ms(self, t: Any) -> float:
+        """Convert a datetime or float timestamp to epoch milliseconds."""
+        if hasattr(t, "timestamp"):
+            return t.timestamp() * 1000.0
+        return float(t) * 1000.0
+
     def _get_duration(
-        self, kwargs: Dict, start_time: Optional[float], end_time: Optional[float]
+        self, kwargs: Dict, start_time: Any, end_time: Any
     ) -> Optional[float]:
         """
         Extract duration in milliseconds.
@@ -347,7 +353,7 @@ class NewRelicLogger(CustomLogger):
 
         # Fall back to calculating from timestamps
         if start_time is not None and end_time is not None:
-            return (end_time - start_time) * 1000.0  # Convert to milliseconds
+            return self._to_epoch_ms(end_time) - self._to_epoch_ms(start_time)
 
         return None
 
@@ -436,11 +442,7 @@ class NewRelicLogger(CustomLogger):
 
             # Add timestamp for request message if available (convert to milliseconds)
             if start_time is not None:
-                # Handle both datetime objects and float timestamps
-                if hasattr(start_time, "timestamp"):
-                    message_data["timestamp"] = int(start_time.timestamp() * 1000.0)
-                else:
-                    message_data["timestamp"] = int(start_time * 1000.0)
+                message_data["timestamp"] = int(self._to_epoch_ms(start_time))
 
             # Only add content if recording is enabled
             if self._should_record_content():
@@ -465,13 +467,7 @@ class NewRelicLogger(CustomLogger):
 
                     # Add timestamp for response message if available (convert to milliseconds)
                     if end_time is not None:
-                        # Handle both datetime objects and float timestamps
-                        if hasattr(end_time, "timestamp"):
-                            message_data["timestamp"] = int(
-                                end_time.timestamp() * 1000.0
-                            )
-                        else:
-                            message_data["timestamp"] = int(end_time * 1000.0)
+                        message_data["timestamp"] = int(self._to_epoch_ms(end_time))
 
                     # Only add content if recording is enabled
                     if self._should_record_content():
@@ -602,7 +598,7 @@ class NewRelicLogger(CustomLogger):
             import newrelic.agent
 
             app = newrelic.agent.application()
-            if app:
+            if app and app.enabled:
                 app.record_custom_metric("LLM/LiteLLM/Error", 1)
         except Exception as e:
             verbose_logger.warning(f"Failed to record New Relic error metric: {e}")
diff --git a/tests/test_litellm/integrations/newrelic/test_newrelic.py b/tests/test_litellm/integrations/newrelic/test_newrelic.py
index dff6d750e9a..8490ed0d026 100644
--- a/tests/test_litellm/integrations/newrelic/test_newrelic.py
+++ b/tests/test_litellm/integrations/newrelic/test_newrelic.py
@@ -1,5 +1,6 @@
 import os
 import sys
+from datetime import datetime, timezone
 from unittest.mock import MagicMock, patch
 
 import pytest
@@ -290,6 +291,18 @@ class TestGetFinishReason:
         assert self.logger._get_finish_reason({}) == "unknown"
 
 
+class TestToEpochMs:
+    def setup_method(self):
+        self.logger = make_logger()
+
+    def test_float_passthrough(self):
+        assert self.logger._to_epoch_ms(1.0) == pytest.approx(1000.0)
+
+    def test_datetime_converted(self):
+        dt = datetime(2024, 1, 1, 0, 0, 0, tzinfo=timezone.utc)
+        assert self.logger._to_epoch_ms(dt) == pytest.approx(dt.timestamp() * 1000.0)
+
+
 class TestGetDuration:
     def setup_method(self):
         self.logger = make_logger()
@@ -298,11 +311,18 @@ class TestGetDuration:
         kwargs = {"llm_api_duration_ms": 750.0}
         assert self.logger._get_duration(kwargs, 0.0, 1.0) == 750.0
 
-    def test_calculates_from_timestamps_when_kwarg_absent(self):
+    def test_calculates_from_float_timestamps(self):
         kwargs = {}
         result = self.logger._get_duration(kwargs, 1.0, 2.5)
         assert result == pytest.approx(1500.0)
 
+    def test_calculates_from_datetime_timestamps(self):
+        kwargs = {}
+        start = datetime(2024, 1, 1, 0, 0, 0, tzinfo=timezone.utc)
+        end = datetime(2024, 1, 1, 0, 0, 1, 500000, tzinfo=timezone.utc)  # +1.5s
+        result = self.logger._get_duration(kwargs, start, end)
+        assert result == pytest.approx(1500.0)
+
     def test_returns_none_when_nothing_available(self):
         assert self.logger._get_duration({}, None, None) is None
 
@@ -398,12 +418,23 @@ class TestRecordErrorMetric:
     def test_calls_record_custom_metric(self):
         logger = make_logger()
         mock_app = MagicMock()
+        mock_app.enabled = True
 
         with patch("newrelic.agent.application", return_value=mock_app):
             logger._record_error_metric()
 
         mock_app.record_custom_metric.assert_called_once_with("LLM/LiteLLM/Error", 1)
 
+    def test_skips_when_app_disabled(self):
+        logger = make_logger()
+        mock_app = MagicMock()
+        mock_app.enabled = False
+
+        with patch("newrelic.agent.application", return_value=mock_app):
+            logger._record_error_metric()
+
+        mock_app.record_custom_metric.assert_not_called()
+
 
 # ---------------------------------------------------------------------------
 # 9. _emit_supportability_metric