diff --git a/litellm/proxy/_types.py b/litellm/proxy/_types.py
index c3bffc516ca..f188801e093 100644
--- a/litellm/proxy/_types.py
+++ b/litellm/proxy/_types.py
@@ -1664,4 +1664,5 @@ class SpendCalculateRequest(LiteLLMBase):
 
 class ProxyErrorTypes(str, enum.Enum):
     budget_exceeded = "budget_exceeded"
+    expired_key = "expired_key"
     auth_error = "auth_error"
diff --git a/litellm/proxy/auth/user_api_key_auth.py b/litellm/proxy/auth/user_api_key_auth.py
index 4b931a27268..d02ebe4ceb9 100644
--- a/litellm/proxy/auth/user_api_key_auth.py
+++ b/litellm/proxy/auth/user_api_key_auth.py
@@ -753,9 +753,11 @@ async def user_api_key_auth(
                 )
                 if expiry_time < current_time:
                     # Token exists but is expired.
-                    raise HTTPException(
-                        status_code=status.HTTP_403_FORBIDDEN,
-                        detail=f"Authentication Error - Expired Key. Key Expiry time {expiry_time} and current time {current_time}",
+                    raise ProxyException(
+                        message=f"Authentication Error - Expired Key. Key Expiry time {expiry_time} and current time {current_time}",
+                        type=ProxyErrorTypes.expired_key,
+                        code=400,
+                        param=api_key,
                     )
 
             # Check 4. Token Spend is under budget
diff --git a/litellm/tests/test_key_generate_prisma.py b/litellm/tests/test_key_generate_prisma.py
index 48e3689ddfb..0d1f488e1eb 100644
--- a/litellm/tests/test_key_generate_prisma.py
+++ b/litellm/tests/test_key_generate_prisma.py
@@ -941,6 +941,8 @@ def test_generate_and_call_with_expired_key(prisma_client):
         print("Got Exception", e)
         print(e.message)
         assert "Authentication Error" in e.message
+        assert e.type == ProxyErrorTypes.expired_key
+
         pass