Hi,  It is sometimes undesirable to send a full demographic or results feed to departmental clinical systems, that only see a subset of the patients. While some systems (paediatrics, maternity, geriatrics) can filter on patient demographics, a number of systems are for cohorts of patients that don't fit a particular criteria. One of our system vendors has a patient index filter service that keeps a local index of relevant patient identifiers, and only forwards matching messages. Another system takes the full feed, but we gave found this problematic as we can often get demographic updates faster than the receiving system can process them.  Is there a standard 'patient Index filter' in Healthshare that supports a patient index filter type functionality?   Kind regards,  Stephen ![](/sites/default/files/inline/images/images/diagram.png)