diff --git a/apis/python/src/tiledbsoma/io/ingest.py b/apis/python/src/tiledbsoma/io/ingest.py
index 230e3424e8..25a426ceed 100644
--- a/apis/python/src/tiledbsoma/io/ingest.py
+++ b/apis/python/src/tiledbsoma/io/ingest.py
@@ -2030,6 +2030,36 @@ def _chunk_is_contained_in_axis(
     return True
 
 
+def update_uns(
+    exp: Experiment,
+    new_data: Mapping[str, object],
+    measurement_name: str,
+    *,
+    context: Optional[SOMATileDBContext] = None,
+    platform_config: Optional[PlatformConfig] = None,
+) -> None:
+    """
+    TODO: WRITE ME
+    """
+    if exp.closed or exp.mode != "w":
+        raise SOMAError(f"Experiment must be open for write: {exp.uri}")
+    if measurement_name not in exp.ms:
+        raise SOMAError(
+            f"Experiment {exp.uri} has no measurement named {measurement_name}"
+        )
+    m = exp.ms[measurement_name]
+
+    _ingest_uns_dict(
+        m,
+        "uns",
+        new_data,
+        platform_config=platform_config,
+        context=context,
+        ingestion_params=IngestionParams("update", label_mapping=None),
+        use_relative_uri=None,
+    )
+
+
 def _maybe_ingest_uns(
     m: Measurement,
     uns: Mapping[str, object],