New Iris version and decision tables available
2021.02.03
We published a new version of the Iris software and the associated MUSE files - V5.8.0-Y2021S1 and specV2021SR10-Muse. It includes the unicausal and multicausal tables for 2021. Previous version 5 releases have been tested thoroughly and detected errors have been corrected.
Version 5.8.0 also includes updates and user feedbacks. Nevertheless, Iris/MUSE does not process all cases automatically. The following cases should be manually revised after batch processing:
- Post-procedural disorders (E89, G97, H59, H95, I97, K91, M96, N99)
- Pregnancy, childbirth and the puerperium (O00-O99)
- Complications of medical and surgical care (Y40-Y84)
- Sequelae of medical and surgical care (Y880-Y883)
The responsible committee of the WHO Family of International Classifications (WHO-FIC) Network concluded that the ICD-10 emergency codes U08.9, U09.9, U10.9, U11.9 and U12.9 are assigned to "COVID-19" cases.
The titles of the new emergency codes are:
- U08.9 Personal history of COVID-19, unspecified
- U09.9 Post COVID-19 condition, unspecified
- U10.9 Multisystem inflammatory syndrome associated with COVID-19, unspecified
- U11.9 Need for immunization against COVD-19, unspecified
- U12.9 COVID-19 vaccines causing adverse effects in therapeutic use, unspecified
The Iris Institute developed the following causal relations, taking new codes into account:
- Code for personal history: U08.9 should not interact with mortality coding as other Z codes. This code will not be taken into account for the unicausal selection.
- Code for post COVID-19 condition: U09.9 should be used only in multiple cause coding; it should have the same dueto than U07.1-U07.2, as well as for the direct sequel rules (DS). Once the code is selected as underlying cause (not to be used for underlying cause coding), it should be converted into U07.1.
- Code for multisystem inflammatory syndrome: U10.9 should have the same rules as COVID-19. If U07.1 or U07.2 are selected as temporary underlying cause and there is mention of multisystem inflammatory syndrome, U10.9 should be considered as more specific than U07.1 and U07.2.
- Code for need of immunization against COVID-19: U11.9 should not interact with the coding as other Z codes. This code will not be taken into account for the unicausal selection.
- Code for COVID-19 vaccines causing adverse effects in therapeutic use: U12.9 should be used as an external cause code (i.e. as a subcategory under Y59 Other and unspecified vaccines and biological substances). In addition to this, a code from another chapter of the classification should be used indicating the nature of the adverse effect.
The tables have been prepared by the Iris Core Group based on the current knowledge and after discussion in the Mortality Reference Group (MRG).
Please note: The updates for the new emergency codes are included in the specV2021SR20 Muse, which you have to download from the Iris website separately.
For more information about COVID-19, please visit the WHO website:
https://www.who.int/health-topics/coronavirus#tab=tab_1
Moreover, all codes for COVID-19 are kept in the multiple cause string and can be used for analyzing cases where COVID-19 is mentioned, but not selected as UC. There is also the possibility to implement a reject for these cases via the "Dictionary" and/or the "NonConsistentIcdCodes" (NCIC) table.