Ob-gyns, emergency room visits and initial hospital visits need to be concerned. Chiropractic, ob-gyn, and thoracic surgery practices had an alarming billing error rate in 2010, new data indicates. Find out how your specialty rates in data tables the CERT committee released in May. Background: E/M Services Rack Up High Errors CMS evaluated the top 20 Part B service types with the highest improper payment rates, and after chiropractic services (which had almost 44 percent of claims billed in error), E/M services topped the list. Initial hospital visits had a 28.2 percent error rate, followed by new patient office visits, which saw 24 percent of the visits billed incorrectly. When it came to procedures, chemotherapy services had a high error rate, as did lab tests and emergency room visits. What this means: Neurosurgeons, CRNAs See Low Error Rates The CERT report indicates that among the specialties, chiropractors have the highest error rate, at 43.9 percent, followed by thoracic surgeons at 32.2 percent, and both rheumatologists and ob-gyns with error rates just above 25 percent. On the lower end of the spectrum, some specialties billed a vast majority of their claims correctly, the CERT report suggests. Neurosurgeons only had a 2.8 percent error rate, and certified registered nurse anesthetists (CRNAs) had error rates of just 2.2 percent. Also boasting error rates under five percent were ophthalmologists, ASCs, and dermatologists. What this means: CMS Eyeing E/M Codes Based on the extensive number of E/M codes with errors, CMS has been closely reviewing these codes since 2000, the report indicates. Following its initial announcement that these codes would be scrutinized, error rates improved for a while, but then increased again. For instance, outpatient E/M code 99214 saw its error rate fall from a high of 56.6 percent in 1999 to a low of 13.6 percent in 2006, but it has crept back up again, rising to 20.1 percent in 2010. What this means: Resource: