Mapping between ICD-10-AM 3rd and 6th editions

There is one mapping table for mapping between ICD-10-AM 3rd Edition and 6th Edition related to forward mapping (converting ICD-10-AM 3rd Edition codes into ICD-10-AM 6th Edition codes), and one for backward mapping (converting ICD-10-AM 6th Edition codes into ICD-10-AM 3rd 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).

The morphology codes sent to the Ministry do not include the ‘M’ prefix that is used in Australia and may be included in the 3M codefinder 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.

Mapping spreadsheets

The two spreadsheets are called Backwards mapping ICD-10-AM 6th to 3rd Edition.xls and Forwards mapping ICD-10-AM 3rd to 6th Edition.xls

The files have 23322 (backwards) and 22618 (forwards) rows, and contains the following fields:

  • conversion_type
  • clinical_code_type_from
  • clinical_code_from
  • clinical_code_type_to
  • clinical_code_to
  • change.

Conversion_type
This indicates whether mapping is forward or backwards.

  • When the value is 1213 the mapping is forwards from ICD-10-AM 3rd Edition to ICD-10-AM 6th Edition.
  • When the value is 1312 the mapping is backwards from ICD-10-AM 6th Edition to ICD-10-AM 3rd Edition.

The value of Clinical Coding System ID for ICD-10-AM 3rd Edition is 12, and the value of Clinical Coding System ID for ICD-10-AM 6th Edition is 13.

Clinical_code_type_from
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 1213 and ICD-10-AM 6th Edition when the conversion_type is 1312. 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.

Clinical_code_from
This is the ICD-10-AM 3rd Edition code value when the conversion_type is 1213 and ICD-10-AM 6th Edition code value when the conversion_type is 1312.

Clinical_code_type_to
This field shows the value of the clinical code table type code associated with each mapped code for ICD-10-AM 6th Edition when the conversion type is 1213 and ICD-10-AM 3rd Edition when the conversion type is 1312. The same range of code values are used in this field as are in the clinical_code_type_from field.

Clinical_code _to
This is the ICD-10-AM 6th Edition code value when the conversion_type is 1213 and ICD-10-AM 3rd Edition code value when the conversion_type is 1312.

Change
The values in this field are Y (yes) and N (no).

N (no) means that there is no change between the ICD-10-AM 6th edtion code and the ICD-10-AM third edition code.

Back to top