You have a hospital in Manglaralto, located 5 minutes from Montanita. It is a basic public hospital that can answer any questions. In case of emergency be assessed if it is not possible to address Libertad or Salinas to get a private clinic or public hospital to a higher level that has all the specialties.
Another option is to go to Olon (the next town north), because there you can find several private doctors and a health post.