diff --git a/scripts/build_healthcare_campaigns_cron.py b/scripts/build_healthcare_campaigns_cron.py
index b25ed78..faf3049 100644
--- a/scripts/build_healthcare_campaigns_cron.py
+++ b/scripts/build_healthcare_campaigns_cron.py
@@ -191,7 +191,9 @@ def add_subscriber(list_id: int, email: str, name: str, attribs: dict) -> bool:
         })
         return True
     except SystemExit as e:
-        # Already exists -> attach to the list instead.
+        # Already exists -> attach to the list AND refresh attribs so per-segment
+        # merge fields (e.g. days_until for the due-soon template) are correct
+        # even when the same provider already exists from another segment import.
         if "409" in str(e) or "already exists" in str(e).lower():
             try:
                 q = "subscribers.email = '" + email.replace("'", "''") + "'"
@@ -199,6 +201,14 @@ def add_subscriber(list_id: int, email: str, name: str, attribs: dict) -> bool:
                 results = found.get("data", {}).get("results", [])
                 if results:
                     sid = results[0]["id"]
+                    existing_attribs = results[0].get("attribs") or {}
+                    # Merge: keep prior fields, overwrite with this segment's
+                    # values (npi/practice/due-date/days_until/days_overdue).
+                    merged = {**existing_attribs, **attribs}
+                    lm(f"/subscribers/{sid}", {
+                        "email": email, "name": name or email.split("@")[0],
+                        "attribs": merged,
+                    }, "PUT")
                     lm("/subscribers/lists", {"ids": [sid], "action": "add",
                                               "target_list_ids": [list_id],
                                               "status": "confirmed"}, "PUT")