E415A is a new premium code for critical care codes (G521, G523 and G522). It's a 30% premium.  

Source: http://www.health.gov.on.ca/en/pro/programs/ohip/bulletins/redux/bul210303.aspx This temporary premium is only for services rendered between October 1, 2020 and September 30, 2021. E415 mus...