Both Pattaya Memorial and Bangkok Pattaya can do blood test - cost will be about same, maybe with PM being a slight bit less. With the hospitals, you would also incur cost for doctor consultation and hospital fee.

If all you need is the test results and do not need to consult with a Doctor - you may want to consider a laboratory here that many Expats use - the following is from the Pattaya City Expats Club webpage: http://www.pattayacityexpatsclub.com...TH-%20CARE.pdf I presume you are wanting a Prothrombin Time test for blood clotting since Warfarin is an anticoagulant medication. The Laboratory's price list shows they charge 400 Baht for that test http://lifecare.siam2web.com/?cid=1209619

тАв Clinical Lifecare Laboratory
Provides laboratory Diagnostic Blood Testing (provides results - no doctorтАЩs interpretation)
247/59 Moo 10 Pattaya Third Road (South Pattaya going toward Bali Hai Pier - before overpass)
Nongprue, Banglamung, Chonburi
Phone: 038 488 048 or 081 481 7180 or 086 812 9397 Fax: 038 488 048
Web: http://lifecare.siam2web.com (click yellow box with тАЬxтАЭ in upper right corner of webpage тАУ then select UK flag for English.