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Orders & Observations WG

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Welcome to the Orders & Observations Work Group Wiki Site. On these pages we will manage notes and discussions in progress to support the development of V2 and V3 materials by the Orders & Observations Work Group which includes Laboratory.


Co-Chair: Hans Buitendijk; 610-219-2087,

Co-Chair: Gunther Schadow; 610-219-2087,

Co-Chair: Patrick Loyd; 415-209-0544,

Co-Chair: Austin Kreisler; 770-986-3521,

Co-Chair: Robert Hausam MD; 801-415-4412,

Project Fac: Hans Buitendijk

Publishing Fac: Austin Kreisler

Vocab Fac: Robert Hausam

MnM Fac: Patrick Loyd

Conference Calls and Minutes

Dates: Weekly on Thursdays starting January 29, 2009

Time: 13:00 - 14:30 EST

Phone Number: +1 (770) 657 9270

Participant Passcode: 653212

Link to OO WG minutes on


The mission of the Orders and Observation work group is to define information exchange capabilities to support the order/scheduling and clinical event management/reporting requirements between the stakeholders in the healthcare organization regarding patients, non-patients, people, other species, or inanimate objects. These information exchanges are not limited to intra-organizational transactions, but may cross organizational boundaries. These information exchanges may involve messages, documents, services, and other HL7 constructs.


The Orders and Observations work group is current developing v3 messaging artifacts based on the conceptual model depicted below.



The basic charter of the Orders and Observation work group is to continue to support the ongoing development of Version 2.x and ensuring that equivalent functionality is present in HL7 Version 3.0.

Work Products and Contributions to HL7 Processes

The Orders and Observations work group plans on creating and maintaining artifacts in the following areas: - Version 2.x, chapters 4, 4a, 7, 13, 17, and parts of chapter 8

  • General orders and results
  • Lab test orders and results
  • Lab Automation
  • Specimen management
  • Bloodbank
  • Radiology orders and results
  • Medication prescriptions, management, and administration
  • Dietary orders
  • Supply
  • Logistics
  • Healthcare devices orders and observations
  • Clinical Trials
  • Product Experience

It should be noted that many of these areas of information exchange overlap with other HL7 work groups. Since Orders and Observations has responsibility for ongoing maintenance of 2.x standards in these areas and many of the overlapping work groups work solely on V3, this overlap will continue and will require formal coordination with various work groups.

When delineating responsibilities with other work groups, the Orders and Observation work group focuses on ensuring general/composite order/scheduling and observation/clinical event information exchange capabilities are:

  • available across the various work groups involved in orders/scheduling and observations/clinical events
  • consistent within domains and across versions.
  • Version 2.x implementation guides related to the above chapters.
  • Responsible for patterns, messages, documents, services, templates, and implementation guides for:
    • Version 3.0 Orders Domain
    • Including template contributions to Version 3.0 Scheduling
    • Version 3.0 Clinical Event Domain (Observations)
    • Version 3.0 Laboratory Domain
    • Version 3.0 Specimen Domain
    • Version 3.0 Blood, Tissue and Organ Domain
    • Version 3.0 Common Product Model
    • Version 3.0 Materials Management

Formal Relationships with Other HL7 Groups

The Orders and Observations work group has formal relationships with the following HL7 groups, in many cases as a result of V2.x and V3 content overlaps.

  • Anatomic Pathology
  • Clinical Genomics
  • Clinical Statement
  • Healthcare Devices
  • Imaging Integration
  • Patient Administration
  • Patient Care
  • Patient Safety
  • Pharmacy
  • Structured Documents
  • Structure and Semantic Design steering division

Formal Relationships with Groups Outside of HL7

The Orders and Observations work group does not have any formal relationships with groups outside of HL7 at this time.

+ + + News + + +

  • 08-May-09 OO Change Request page added
  • 03-Feb-09 OO wiki pages updated
  • 29-Jan-09 Lab WG has dissolved and merged with OO
  • 12-May-06 Welcome to the new O&O wiki page!