diff --git a/homeassistant/components/nam/const.py b/homeassistant/components/nam/const.py
index d4781fa0c49..8f1ba356fc9 100644
--- a/homeassistant/components/nam/const.py
+++ b/homeassistant/components/nam/const.py
@@ -20,6 +20,7 @@ from homeassistant.const import (
     DEVICE_CLASS_SIGNAL_STRENGTH,
     DEVICE_CLASS_TEMPERATURE,
     DEVICE_CLASS_TIMESTAMP,
+    ENTITY_CATEGORY_DIAGNOSTIC,
     PERCENTAGE,
     PRESSURE_HPA,
     SIGNAL_STRENGTH_DECIBELS_MILLIWATT,
@@ -214,11 +215,13 @@ SENSORS: Final[tuple[SensorEntityDescription, ...]] = (
         device_class=DEVICE_CLASS_SIGNAL_STRENGTH,
         entity_registry_enabled_default=False,
         state_class=STATE_CLASS_MEASUREMENT,
+        entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
     ),
     SensorEntityDescription(
         key=ATTR_UPTIME,
         name=f"{DEFAULT_NAME} Uptime",
         device_class=DEVICE_CLASS_TIMESTAMP,
         entity_registry_enabled_default=False,
+        entity_category=ENTITY_CATEGORY_DIAGNOSTIC,
     ),
 )