Update app.py

app.py

@@ -88,11 +88,14 @@ def confirm_tests_interface(patient_id, selected_tests):
     return response
 
 
-# Billing Tab
 def billing_interface(patient_id):
-    data = load_data()
-    billing_info = fetch_billing(patient_id, data)
-    return billing_info
+    patients, _ = load_data()  # Load patients and ignore last_sequence
+    if patient_id in patients:
+        billing_info = fetch_billing(patient_id, patients)
+        return billing_info
+    else:
+        return "Invalid Patient ID. Please check the ID."
+
 
 # Gradio Interface
 with gr.Blocks() as app: