Yes, it is a good ideal to purchase travel medical insurance for your parents. Insurance will cover for any new sicknesses or injuries as per the policy. You may see any doctor or visit any facility with your visitors insurance.
You can get quotes and compare all available top-rated insurance plans availabe for them here: http://www.visitorscoverage.com/visitor-insurance/
If you need assistance in picking a policy or have questions, please call our customer support at 866-384-9104. Or you can also write to us at Support @ VisitorsCoverage.com.
Insurance rates are regulated by law. You can't find the same insurance plan for a lower price anywhere else