diff --git a/source/NVDAObjects/UIA/VisualStudio.py b/source/NVDAObjects/UIA/VisualStudio.py
index 380c17cf27a..edd3ec03b8b 100644
--- a/source/NVDAObjects/UIA/VisualStudio.py
+++ b/source/NVDAObjects/UIA/VisualStudio.py
@@ -7,10 +7,11 @@
 available in Visual Studio and SQL Server Management Studio.
 """
 
-from . import UIA
+from . import UIA, ToolTip
 import speech
 import braille
 import api
+import time
 
 
 class IntelliSenseItem(UIA):
@@ -53,6 +54,34 @@ class IntelliSenseLiveRegion(UIA):
 }
 
 
+class CompletionToolTip(ToolTip):
+	""" A tool tip for which duplicate open events can be fired.
+	"""
+
+	#: Keeps track of the last ToolTipOpened event (text, time)
+	_lastToolTipOpenedInfo = (None, None)
+	#: The duplicate tooltip events will be dropped within this time window
+	_preventDuplicateToolTipSeconds = 0.2
+
+	def event_UIA_toolTipOpened(self):
+		oldText, oldTime = self._lastToolTipOpenedInfo
+		newText = self.name
+		newTime = time.time()
+		self.__class__._lastToolTipOpenedInfo = (newText, newTime)
+		withinPossibleDupToolTipTimeWindow = (
+			oldTime is not None
+			and (newTime - oldTime) < self._preventDuplicateToolTipSeconds
+		)
+		if newText == oldText and withinPossibleDupToolTipTimeWindow:
+			# Tool-tip event suspected to be a duplicate, drop the event.
+			# - Users attempting to rapidly re-announce tool-tips may
+			#   have the announcement erroneously  suppressed
+			# - Users on slower systems (or systems under load) may still
+			#   receive duplicate announcements
+			return
+		super().event_UIA_toolTipOpened()
+
+
 def findExtraOverlayClasses(obj, clsList):
 	if obj.UIAAutomationId in _INTELLISENSE_LIST_AUTOMATION_IDS:
 		clsList.insert(0, IntelliSenseList)
@@ -64,3 +93,5 @@ def findExtraOverlayClasses(obj, clsList):
 		and isinstance(obj.previous.previous, IntelliSenseList)
 	):
 		clsList.insert(0, IntelliSenseLiveRegion)
+	elif obj.UIAAutomationId == "completion tooltip":
+		clsList.insert(0, CompletionToolTip)
diff --git a/user_docs/en/changes.t2t b/user_docs/en/changes.t2t
index 7ce7551e2b5..254235c6f6c 100644
--- a/user_docs/en/changes.t2t
+++ b/user_docs/en/changes.t2t
@@ -57,6 +57,7 @@ What's New in NVDA
 - In Microsoft Teams builds with version numbers like 1.3.00.28xxx, NVDA no longer fails reading messages in chats or Teams channels due to an incorrectly focused menu. (#11821)
 - Text marked both as being a spelling and grammar error at the same time in Google Chrome will be appropriately announced as both a spelling and grammar error by NVDA. (#11787)
 - When using Outlook (French locale), the shortcut for 'Reply all' (control+shift+R) works again. (#11196)
+- In Visual Studio, IntelliSense tool tips that provide additional details about the currently selected IntelliSense item are now only reported once. (#11611)
 
 
 == Changes for Developers ==