diff --git a/pandas/core/dtypes/dtypes.py b/pandas/core/dtypes/dtypes.py
index 58e91f46dff43..70b1f8a4b18e3 100644
--- a/pandas/core/dtypes/dtypes.py
+++ b/pandas/core/dtypes/dtypes.py
@@ -1054,7 +1054,8 @@ class IntervalDtype(PandasExtensionDtype):
         "closed",
     )
     _match = re.compile(
-        r"(I|i)nterval\[(?P<subtype>[^,]+)(, (?P<closed>(right|left|both|neither)))?\]"
+        r"(I|i)nterval\[(?P<subtype>[^,]+(\[.+\])?)"
+        r"(, (?P<closed>(right|left|both|neither)))?\]"
     )
     _cache_dtypes: dict[str_type, PandasExtensionDtype] = {}