diff --git a/src/aces/__main__.py b/src/aces/__main__.py
index 1345b37..9c97df7 100644
--- a/src/aces/__main__.py
+++ b/src/aces/__main__.py
@@ -45,6 +45,9 @@ def main(cfg: DictConfig):
     # query results
     result = query.query(task_cfg, predicates_df)
 
+    if cfg.data.standard.lower() == "meds":
+        result = result.rename(columns={"subject_id": "patient_id"})
+
     # save results to parquet
     os.makedirs(os.path.dirname(cfg.output_filepath), exist_ok=True)
     result.write_parquet(cfg.output_filepath, use_pyarrow=True)