The actual cost of the lawsuits is tiny compared with the amount of time medical personnel spend on lawsuit prevention. I'm a long time hospital RN, and believe me when I tell you that the medical record of the patient is where the emphasis is placed, more and more over the years. For a floor nurse, charting what she does takes triple the amount of time of the actual procedure. It's all for the lawyers. Doctors order tests to avoid lawsuits every day; the unnecessary expenses are not for the patient's health or safety, but to avoid being sued and losing his license to practice medicine.
Eta : I couldn't access your link on mobile, so i will read that article another time.