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BACKGROUND There have been recent claims of overdiagnosis and unnecessary treatment in dermatology. One potential manifestation of overutilization would be providers who perform numerous biopsies per patient. OBJECTIVE To identify the frequency of skin biopsy rate outliers. MATERIALS AND METHODS Data on biopsy rates at the individual provider level were obtained from Medicare Provider Utilization and Payment Data Public Use Files. The total number of biopsies for each provider was obtained by summing the number of claimed biopsy services for each unique National Provider Identifier. The visit count for each provider was obtained by summing all evaluation and management services claimed. Provider biopsy rates were calculated by dividing the total number of biopsies associated with each National Provider Identifier by the corresponding visit count. RESULTS The mean provider biopsy rate was 0.31 services per visit, or approximately 1 biopsy every 3 visits. Defining outliers as providers who averaged 3 or more biopsies per visit, there were 38 outliers out of 18,260 providers. Physicians had a lower mean biopsy rate than nonphysician clinicians (p = 1.70E–28). CONCLUSION Contrary to claims, the authors' results do not indicate widespread overutilization of skin biopsy services.

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