Detecting Potential Overbilling in Medicare Reimbursement via Hours Worked: Comment
评论了Fang和Gong（2017）检测医生超额收费的方法，指出其使用汇总数据可能夸大服务数量，并展示审计人员如何利用详细理赔数据更精准地定位不当超额收费。
Fang and Gong (2017) develop a procedure to detect potential over-billing of Medicare by physicians. In their empirical analysis, they use aggregated claims data that can overstate the number of services performed due to features of Medicare billing. In this comment, I show how auditors can use detailed claims-level data to better target improper overbilling.