diff --git a/src/numpy-stubs/__init__.pyi b/src/numpy-stubs/__init__.pyi
index c131e44e..45895a5c 100644
--- a/src/numpy-stubs/__init__.pyi
+++ b/src/numpy-stubs/__init__.pyi
@@ -670,9 +670,9 @@ _SignedIntegerT = TypeVar("_SignedIntegerT", bound=signedinteger)
 _UnsignedIntegerT = TypeVar("_UnsignedIntegerT", bound=unsignedinteger)
 _CharT = TypeVar("_CharT", bound=character)
 
-_BitT = TypeVar("_BitT", bound=NBitBase, default=Any)
-_BitT1 = TypeVar("_BitT1", bound=NBitBase, default=Any)
-_BitT2 = TypeVar("_BitT2", bound=NBitBase, default=_BitT1)
+_BitT = TypeVar("_BitT", bound=NBitBase, default=Any)  # pyright: ignore[reportDeprecated]
+_BitT1 = TypeVar("_BitT1", bound=NBitBase, default=Any)  # pyright: ignore[reportDeprecated]
+_BitT2 = TypeVar("_BitT2", bound=NBitBase, default=_BitT1)  # pyright: ignore[reportDeprecated]
 
 _ItemT_co = TypeVar("_ItemT_co", default=Any, covariant=True)
 _BoolItemT_co = TypeVar("_BoolItemT_co", bound=py_bool, default=py_bool, covariant=True)
diff --git a/src/numpy-stubs/_typing/_nbit_base.pyi b/src/numpy-stubs/_typing/_nbit_base.pyi
index 870559f2..19b0a5c3 100644
--- a/src/numpy-stubs/_typing/_nbit_base.pyi
+++ b/src/numpy-stubs/_typing/_nbit_base.pyi
@@ -1,9 +1,16 @@
 # mypy: disable-error-code="misc"
 from typing import final, type_check_only
+from typing_extensions import deprecated
 
 # exported as numpy.typing.NBitBase
 
+# Documentation: https://numpy.org/numtype/user_guide/differences/#no-more-nbitbase
 @final
+@deprecated(
+    "NBitBase is deprecated and should not be used. "
+    "NumPy scalar types are now concrete and no longer accept generic bounds like np.floating[T]. "
+    "Use abstract types (e.g., np.floating) as bounds instead."
+)
 class NBitBase: ...
 
 ###
@@ -11,7 +18,7 @@ class NBitBase: ...
 
 # long double
 @type_check_only
-class _64L(NBitBase): ...  # pyright: ignore[reportGeneralTypeIssues]
+class _64L(NBitBase): ...  # pyright: ignore[reportDeprecated, reportGeneralTypeIssues]
 
 @type_check_only
 class _64(_64L): ...