It's not that simple. Despite often recognising another licence for conversion, each country has its own medical standards and it is surprising how much variation there is in the application of those. ICAO may set minimum standards, but sovereign states are free to go as far above those minimums as they choose. Read the horror stories on other threads here about China, where you would expect the standard to be basic ICAO. Apparently it is ridiculously high - for expats anyway.
Before spending your hard-earned on flying, my advice is to take the ATPL medical in the country where you expect to be working. Not the PPL medical - the full, initial ATPL. Remember you will have to do a medical every six or 12 months for the rest of your career, so it is better to find out now whether you will encounter problems.
Last edited by Mach E Avelli; 21st Jul 2013 at 22:29.