![]() ![]() The complex mapping must be applied before to the calculation of the AN-DRG. There are also cases where two ICD-10 codes map to one ICD-9 code. The largest number of codes involved is one ICD-10 code which maps to three ICD-9 codes. Most of the backward mappings are also one-to-one, although where either the ICD-10 or the ICD-9 codes capture more complexity the mappings are in a format of one-to-many. The Ministry of Health can assist hospitals that are programming the mappings into their local systems, by providing a copy of the code we have written, and also files of test data to validate their results.Īll of the forward mappings are in a one-to-one format. We mapped this back to ICD-9 and validated our DRGs against the Victorian file. ![]() As a further check, Victoria supplied the Ministry of Health with a file of 257,000 records of their ICD-10 data. We have processed a year of NMDS data through these mappings and compared the results to ensure that they are identical. In order to validate our understanding and application of the mapping files, the Ministry of Health has programmed them in two languages (SAS and Java). This process ensures those New Zealand hospitals, the Ministry of Health and 3M are all using the same mappings, which are up to date, and also that data from New Zealand hospitals is consistent with that in Victoria. Victoria reviews these queries and where they result in changes to the mapping tables, all hospitals and encoder developers, along with the Commonwealth Office, who define the grouper specifications, are advised. This is the same process as followed by Victorian hospitals. The Ministry of Health has reviewed the NCCH mappings and the Victorian fixes, and where we have queries we have forwarded them to Victorian Department of Human Services. Logical maps ensure that for a given ICD-10-AM code, the backward ICD-9-CM code and any ICD-9-CM codes which forward map to the code are in the same principal diagnosis list for the grouper. These files are logical maps and they all include the first and second Victorian coding fixes. The software to map between ICD-9-CM-A and ICD-10-AM comprises three mapping files, each in Excel spreadsheet format:Ī forward (ICD-9 to ICD-10) mapping file of one-to-one codes (Zip, 635 KB)Ī backward (ICD-10 to ICD-9) mapping file of one-to-one codes (Zip, 951 KB)Ī backward file of complex mappings (Zip, 19 KB) which address instances where one ICD-10 code maps to more than one ICD-9 code or two ICD-10 codes map to one ICD-9 code there are five worksheets within this spreadsheet. Note: The Ministry of Health would like to acknowledge the support and assistance given by the Department of Human Services, Victoria, in the development of these mapping files. Note that as of 1 July 2000 these files have been superseded by new files which incorporate the 3rd mapping fix – see above. ![]() The previous mapping files and the accompanying documentation are given below. This fix only affects backwards (ICD-10-AM to ICD-9-CM-A) mapping, but the forward mapping file (ICD-9-CM-A to ICD-10-AM) is included here also for completeness.Ī complete list of one-to-one backwards mappings (Excel, 4 MB), also available as a Zip file (982 KB)Ī complete list of all the complex mappings (Excel, 87 KB)Ī list of the additional one-to-one mappings in this fix (Excel, 14 KB)Ī list of the additional complex mappings in this fix (Excel, 14 KB)Ī complete list of one-to-one forward mappings (Excel, 2.7 MB), also available as a Zip file (635 KB). ![]() This principally accommodates the current inconsistencies in mapping diverticular disease with complications. ![]()
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