Also document query, exchange query, Carequality query
A network query is two steps that look like one. The first asks every connected organization whether it knows the patient, matching on name, date of birth, sex and address. The second asks each organization that answered yes for the documents it holds, and retrieves them. The IHE profiles the networks run on name these patient discovery and document query and retrieve; the agency experiences them as one request and a list of what came back.
What distinguishes it from every other route to outside records:
- It asks everyone at once. A fax goes to the organization the agency thought to ask. A portal like EpicCare Link shows one health system. A query reaches every organization on Carequality, CommonWell and the TEFCA QHINs, including the specialist in another city the patient forgot to mention.
- It returns documents, with provenance. Each result is a C-CDA document or an attached file, carrying the releasing organization’s name and the date, so the receiving clinician knows whose record they are reading and how old it is.
- It runs under a purpose of use. A treatment query is made by a treating provider and answered on that basis; see treatment purpose of use. A query for another purpose is not guaranteed an answer.
What it does not do is also worth knowing. It returns what connected organizations hold, so a practice that is not on any network is not reached and still needs a fax or a call. It returns documents, not images, so a scanned paper chart at a small practice comes back only if that practice attached it. And it returns a great deal: a patient with a long history can return dozens of documents from a dozen organizations, which is why the organization of what comes back is as much of the work as the retrieval.
