What is the difference between the standards of medical coding and billing of Canada and the U.S.

There are differences.  

The standards of medical coding and billing are very different in the two countries, including the requirement for certification as a CPC (http://cpcexam.ellsed.com)

U.S. ICD-9 used for diagnosis, while Canada uses ICD-10. In Canada, the work of a medical coder is often handled by the medical receptionist, while in the U.S., the scope of medical coding career is relatively better, due to pressure the government sector health.

In Canada, 

You can find equivalent opportunities in companies such as office equipment, Vancouver Coastal Health Authority and Canada STARTEK. Certifications and equivalent experience are important for a career in this field.