diff --git a/pandas/core/arrays/numeric.py b/pandas/core/arrays/numeric.py
index cdffd57df9a84..b32cbdcba1853 100644
--- a/pandas/core/arrays/numeric.py
+++ b/pandas/core/arrays/numeric.py
@@ -5,6 +5,7 @@
     TYPE_CHECKING,
     Any,
     Callable,
+    Mapping,
     TypeVar,
 )
 
@@ -113,11 +114,11 @@ def __from_arrow__(
             return array_class._concat_same_type(results)
 
     @classmethod
-    def _str_to_dtype_mapping(cls):
+    def _str_to_dtype_mapping(cls) -> Mapping[str, NumericDtype]:
         raise AbstractMethodError(cls)
 
     @classmethod
-    def _standardize_dtype(cls, dtype) -> NumericDtype:
+    def _standardize_dtype(cls, dtype: NumericDtype | str | np.dtype) -> NumericDtype:
         """
         Convert a string representation or a numpy dtype to NumericDtype.
         """
@@ -126,7 +127,7 @@ def _standardize_dtype(cls, dtype) -> NumericDtype:
             # https://github.com/numpy/numpy/pull/7476
             dtype = dtype.lower()
 
-        if not issubclass(type(dtype), cls):
+        if not isinstance(dtype, NumericDtype):
             mapping = cls._str_to_dtype_mapping()
             try:
                 dtype = mapping[str(np.dtype(dtype))]
diff --git a/pyright_reportGeneralTypeIssues.json b/pyright_reportGeneralTypeIssues.json
index f6f9bed1af065..d05de313d7f46 100644
--- a/pyright_reportGeneralTypeIssues.json
+++ b/pyright_reportGeneralTypeIssues.json
@@ -28,7 +28,6 @@
         "pandas/core/arrays/datetimes.py",
         "pandas/core/arrays/interval.py",
         "pandas/core/arrays/masked.py",
-        "pandas/core/arrays/numeric.py",
         "pandas/core/arrays/period.py",
         "pandas/core/arrays/sparse/array.py",
         "pandas/core/arrays/sparse/dtype.py",