diff --git a/_delphi_utils_python/delphi_utils/__init__.py b/_delphi_utils_python/delphi_utils/__init__.py
index 5d8dbfcc6..db3b9c0d8 100644
--- a/_delphi_utils_python/delphi_utils/__init__.py
+++ b/_delphi_utils_python/delphi_utils/__init__.py
@@ -12,5 +12,6 @@
 from .geomap import GeoMapper
 from .smooth import Smoother
 from .signal import add_prefix
+from .nancodes import Nans
 
 __version__ = "0.1.0"
diff --git a/_delphi_utils_python/delphi_utils/nancodes.py b/_delphi_utils_python/delphi_utils/nancodes.py
new file mode 100644
index 000000000..e9e5a915a
--- /dev/null
+++ b/_delphi_utils_python/delphi_utils/nancodes.py
@@ -0,0 +1,13 @@
+"""Unified not-a-number codes for CMU Delphi codebase."""
+
+from enum import IntEnum
+
+class Nans(IntEnum):
+    """An enum of not-a-number codes for the indicators."""
+
+    NOT_MISSING = 0
+    NOT_APPLICABLE = 1
+    REGION_EXCEPTION = 2
+    PRIVACY = 3
+    DELETED = 4
+    UNKNOWN = 5