The average salary of a registered Medical Office Assistant ranges from $43k to $46k per annum in Ontario. The starting wages of an MOA can be $15 to $16 per hour and can go as high as 32 with an average coming to $22 per hour. Medical assistants have a promising future with the increasing number of hospitals, medical provider offices, and patient demand in the healthcare sector which will result in job growth over the next 10 years.