Chances are, whatever medical department you work in there are terminology standards with regularly scheduled updates.

The FY2020 ICD-10-CM (version 37) will come into effect October 1, 2019. Most of the changes involve adding specificity to existing FY2019 codes

Here are the highlights from the upcoming fiscal year 2019 edition (effective October 1st, 2018):

Mapping between the code systems of different countries: A case study – CCI to ICD-10-PCS.