The pre-issue medical exams here are not much.
All they did for me was take my blood presure and weigh me.And I am "Obese"!
Have had the policy for about 10 years,been hospitalized,and "SHOCKED" six or more times for Atrial Fib.,no problems with coverage,or renewal every year.
I would keep your present policy.Try to get a policy somewhere else,and see what happens. If she gets coverage somewhere else,and then treatment and payment for her ailments,after the waiting period,you can drop the first policy.
As this is a new year,she MAY have benefits again from the company you have now.
After working in a hospital in Santo Domingo for over 10 years,I can tell you,that when the bill is over 20,000 or 30,000 pesos,the insurance companies may try to dump you,and find a "reason" not to pay the bill!
Remember,"What the BIG PRINT gives,the small print takes away!!!!!"
CC