1. Patient Identifier Cross-Referencing for MPI (PIX)
Didi Davis
Director, Eclipsys Corporation
Co-chair, IT Infrastructure Planning Committee

2. Working Together to Deliver Interoperable Health Information Systems
W W W . I H E . N E T
Providers and Vendors
Working Together to Deliver
Interoperable Health Information Systems
In the Enterprise
and Across Care Settings
June 28-29, 2005
Interoperability Strategy Workshop

3. IT Infrastructure Profiles
2004
Patient Identifier Cross-referencing for MPI (PIX)
Retrieve Information for Display (RID)
Consistent Time (CT)
Patient Synchronized Applications (PSA)
Enterprise User Authentication (EUA)
2005
Patient Demographic Query (PDQ)
Cross Enterprise Document Sharing (XDS)
Audit Trail and Note Authentication (ATNA)
Personnel White Pages (PWP)
2006
Cross-Enterprise User Authentication (XUA)
Document Digital Signature (DSG) –
Notification of Document Availability (NAV)
Patient Administration/Management (PAM)
Patient Identifier Cross-referencing for MPI (PIX)
(Map patient identifiers across independent identification domains)
June 28-29, 2005
Interoperability Strategy Workshop

4. Patient Identifier Cross-referencing for MPI Abstract / Scope
Allow all enterprise participants to register the identifiers they use for patients in their domain
Participants retain control over their own domain’s patient index(es)
Support domain systems’ queries for other systems’ identifiers for their patients
Optionally, notify domain systems when other systems update identifiers for their patients
June 28-29, 2005
Interoperability Strategy Workshop

5. Patient Identifier Cross-referencing for MPI Value Proposition
Maintain all systems’ identifiers for a patient in a single location
Use any algorithms (encapsulated) to find matching patients across disparate identifier domains
Lower cost for synchronizing data across systems
No need to force identifier and format changes onto existing systems
Leverages standards and transactions already used within IHE
June 28-29, 2005
Interoperability Strategy Workshop

6. Patient Identifier Cross-referencing for MPI Transaction Diagram
June 28-29, 2005
Interoperability Strategy Workshop

7. Interoperability Strategy Workshop
Patient Identifier Cross-referencing for MPI Process Flow Showing ID Domains & Transactions
June 28-29, 2005
Interoperability Strategy Workshop

8. Patient Identifier Cross-referencing for MPI
Identity
Patient
Cross References
B:X456 C: ?
B:X456 C: 2RT
June 28-29, 2005
Interoperability Strategy Workshop

9. Patient Identifier Cross-referencing for MPI Actors
Patient Identity Source
Definition
Assigns patient identities within its own domain
Notifies Patient Identifier Cross-reference Manager of all events related to patient identification (creation, merge, etc.)
Example: Registration (ADT) Actor in IHE Radiology Scheduled Workflow (SWF) Profile
Transaction Supported - Required
Patient Identity Feed [ITI-8] (as sender)
June 28-29, 2005
Interoperability Strategy Workshop

10. Patient Identifier Cross-referencing for MPI Actors
Patient Identifier Cross-reference Consumer
Definition
Requires information about patient identifiers in other domains
Requests patient identifier information from Patient Identifier Cross-reference Manager
Transaction Supported - Required
PIX Query [ITI-9] (as sender)
Transaction Supported - Optional
PIX Update Notification [ITI-10] (as receiver)
June 28-29, 2005
Interoperability Strategy Workshop

11. Patient Identifier Cross-referencing for MPI Actors
Patient Identifier Cross-reference Manager
Definition
Serves a well-defined set of Patient Identifier Domains
Receives patient identifier information from Patient Identity Source Actors
Manages cross-referencing of identifiers across domains
Transactions Supported - Required
Patient Identity Feed [ITI-8] (as receiver)
PIX Query [ITI-9] (as receiver)
PIX Update Notification [ITI-10] (as sender)
June 28-29, 2005
Interoperability Strategy Workshop

12. Patient Identifier Cross-referencing for MPI Standards Used
HL7 Version 2.5
ADT Registration and Update Trigger Events
A01: inpatient admission
A04: outpatient registration
A05: pre-admission
A08: patient update
A40: merge patient
Queries for Corresponding Identifiers (ADT^Q23/K23)
Notification of Identifiers Lists Updates (ADT^A31)
June 28-29, 2005
Interoperability Strategy Workshop

13. PIX Integration Profile & MPI The typical view
Master Patient
Index
Patient Identity Cross-reference Manager
Patient Identification Domain A
(Master Domain)
Master (A) Patient Identity Source
Patient Identification
Domain B
Patient Identification
Domain C
June 28-29, 2005
Interoperability Strategy Workshop

14. PIX Integration Profile & MPI The Equivalent IHE Model
Master Patient
Index
Patient Identity Cross-reference Manager
Patient Identification Domain A
(Master Domain)
Master (A) Patient Identity Source
Patient Identification
Domain B
Patient Identification
Domain C
June 28-29, 2005
Interoperability Strategy Workshop

15. Interoperability Strategy Workshop
More information….
IHE Web sites:
Technical Frameworks, Supplements
ITI Technical Framework
Radiology Technical Framework
LAB Technical Framework
Cardiology Technical Framework
ITI Supplements for trial implementation
August 2005: Radiology, Cardiology, IT Infrastructure, PCC
Non-Technical Brochures :
Calls for Participation
IHE Fact Sheet and FAQ
IHE Integration Profiles: Guidelines for Buyers
IHE Connect-a-thon Results
Vendor Products Integration Statements
June 28-29, 2005
Interoperability Strategy Workshop