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Basic HL7 Interfaces

Explore essential HL7 interfaces for seamless data exchange in healthcare. Learn about ADT, ORM, ORU, DFT, MDM, & SIU for efficient interoperability.

HL7 (Health Level Seven) interfaces are standardized communication protocols used in the healthcare industry to enable the exchange, integration, sharing, and retrieval of electronic health information between different healthcare systems and applications. These interfaces facilitate seamless communication and interoperability among various healthcare applications, ensuring that patient data is accurately and securely transmitted between systems, such as Electronic Health Records (EHRs), laboratory systems, and billing platforms. By implementing HL7 interfaces, healthcare organizations can improve patient care, streamline workflows, and enhance decision-making processes.


Below are few HL7 interfaces that we at Data InterOps believe are essential in ensuring a truly interoperable healthcare data experience.


  1. ADT (Admission, Discharge, and Transfer) Interface: This interface manages patient demographic information and movements within a healthcare facility, such as admissions, discharges, transfers, and registration updates.

  2. ORM (Order Management) Interface: This interface handles the communication of orders for various services, such as laboratory tests, radiology exams, or medications, between healthcare applications.

  3. ORU (Observation Result) Interface: This interface manages the transmission of clinical and diagnostic results, such as lab results or imaging studies, from one system to another, ensuring that healthcare providers have access to up-to-date patient information.

  4. MDM (Medical Document Management) Interface: This interface is responsible for the exchange of clinical documents and reports, such as discharge summaries, progress notes, and consultation reports, between different healthcare systems.

  5. DFT (Detailed Financial Transactions) Interface: This interface facilitates the exchange of financial and billing information related to patient care, helping healthcare organizations streamline their revenue cycle management processes.

  6. SIU (Scheduling Information Unsolicited) Interface: This interface manages the scheduling of appointments, procedures, and other events within a healthcare facility, ensuring the efficient use of resources and coordination among different departments.

  7. MFN (Master Files Notification) Interface: This interface is used to synchronize master files, such as patient, provider, or location information, across multiple systems, ensuring data consistency and accuracy.

  8. RDE (Pharmacy/Treatment Encoded Order) Interface: This interface manages the communication of medication and treatment orders between healthcare systems, ensuring that prescriptions are accurately transmitted and reducing the risk of medication errors.

  9. QRY (Query) Interface: This interface enables healthcare applications to request specific information from other systems, such as patient demographics or clinical data, allowing healthcare providers to access the information they need to make informed decisions about patient care.


While the above list is not comprehensive, we believe that these interfaces are the basic essential interfaces that healthcare service providers such as hospitals and clinics can begin with.

Have questions? Reach out to us below and we'll try our best to answer your questions.




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