BACKGROUND:European studies have shown that itch is a widespread symptom, yet little is known about its frequency in the United States. OBJECTIVE:We sought to describe ambulatory care visits to clinicians in the United States for which itch was coded as a patient symptom. METHODS:This study uses retrospective data from the National Ambulatory Medical Care Survey from 1999 through 2009. RESULTS:Itch was coded as a symptom for an average of 7 million visits per year or approximately 1% of all outpatient visits, which was nearly 40% of the number of visits for the symptom of low back pain. Patients seen in visits for itch were more likely to be black or Asian than other patients (20% vs 14%). They were also more likely than other patients to receive a new medication (68% vs 36%) and were over twice as likely to receive 2 or more new medications (31% vs 14%). LIMITATIONS:Secondary data sets may not optimally capture patient reports and some of the procedures or medications may have been ordered for reasons other than itch. CONCLUSION:Visits to clinicians for itch represent a sizeable proportion of ambulatory care visits in the United States, and research on the epidemiology, treatments, and causes of itch should be a priority.

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