Modifier misuse
Practice Central | As it turns out, the AT modifier does not stand for “all the time”When the centers for Medicare and Medicaid Services (CMS) told chiropractors that it would only approve claims submitted with the AT (active treatment) modifier, those chiropractors listened. In fact, they listened so well that according to a recent Office of Inspector General (OIG) report, slightly more than 95 percent of Medicare claims submitted in 2013 (the last year studied) were coded with the AT modifier.












