There is one mapping table for mapping between ICD-10-AM 2nd Edition and 3rd Edition related to forward mapping (converting ICD-10-AM 2nd Edition codes into ICD-10-AM 3rd Edition codes), and backward mapping (converting ICD-10-AM 3rd Edition codes into ICD-10-AM 2nd Edition codes).
The mapping tables includes:
- diagnosis codes
- procedure/operation codes
- injury codes
- external cause codes
- morphology codes
- other health factors (previously known as V-codes).
These code tables do not include any punctuation in the code values (but punctuation is included in the NCCH coding books and in the encoder software).
The morphology codes sent to the Ministry of Health do not include the ‘M’ prefix that is used in Australia and may be included in the 3M encoder software. In addition, morphology codes should not include a fifth digit. This information is gathered by the Ministry of Health from labs and not from hospital discharge records.
This file is called diagnosis_conversion_1112.xls
The file has 43,495 rows, and contains the following fields:
- clinical_code type_from
This indicates whether mapping is forward or backwards.
- When the value is 1112 the mapping is forwards from ICD-10-AM 2nd Edition to ICD-10-AM 3rd Edition.
- When the value is 1211 the mapping is backwards from ICD-10-AM 3rd Edition to ICD-10-AM 2nd Edition.
The value of Clinical Coding System ID for ICD-10-AM 2nd Edition is 11, and the value of Clinical Coding System ID for ICD-10-AM 3rd Edition is 12.
This field shows the value of the clinical code table type code associated with each mapped code for ICD-10-AM 2nd Edition when the conversion_type is 1112 and ICD-10-AM 3rd Edition when the conversion_type is 1211. The values in this field are:
- A = diseases/diagnoses
- B = injury codes
- E = External cause codes
- O = procedure/operation codes
- M = morphology codes
- V = other health factors.
This field can be used if you only want a subset of the mapping codes – eg, to map only procedures/operations choose any rows with an O in the clinical_code_type_from field.
This is the ICD-10-AM 2nd Edition code value when the conversion_type is 1112 and ICD-10-AM 3rd Edition code value when the conversion_type is 1211.
This field shows the value of the clinical code table type code associated with each mapped code for ICD-10-AM 3rd Edition when the conversion type is 1112 and ICD-10-AM 2nd Edition when the conversion type is 1211. The same range of code values are used in this field as are in the clinical_code_type_from field.
This is the ICD-10-AM 3rd Edition code value when the conversion_type is 1112 and ICD-10-AM 2nd Edition code value when the conversion_type is 1211.
The values in this field are Y (yes) and N (no).
N (no) means that there is no change between the ICD-10-AM third edition code and the ICD-10-AM second edition code.