№ files_lp_4_process_2_58007
Technical specification of the New Zealand public hospital casemix funding framework describing WIESNZ25 cost-weight calculation, diagnosis-related group mappings, exclusions, and purchase unit allocation rules for the 2025/26 financial year within the National Minimum Dataset.
Country: New Zealand
Sector: Public health system
Subject: Hospital casemix funding methodology and cost weight calculation
Document type: Technical framework and implementation specification
Responsible organisation: Health New Zealand | Te Whatu Ora
Project group: NCCPP Casemix – Cost Weights Project Group
Financial year covered: 2025/26
Methodology referenced: WIESNZ25
Clinical classification systems referenced: ICD-10-AM, ACHI Twelfth Edition, AR-DRG Version 11.0
Data system referenced: National Minimum Dataset (NMDS)
Version updates: 1.1 (13 March 2025); 1.2 (June 2025); 1.3 (30 June 2025); 1.4 (18 December 2025)
Contact person: Tracy Thompson
Contact unit: National Collections, Data and Analytics
Source authority for classification systems: Independent Health and Aged Care Pricing Authority
Implementation scope: Publicly funded hospital inpatient events and purchase unit allocation
Associated datasets and tools: DRG cost weights tables, SAS code for WIESNZ25 calculation
Price: 8 / 10 USD
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