biostudies-literatureUnknown11(1)Gupta AK<h4>Introduction</h4>Onychomycosis is a complex nail disease that is commonly seen in daily practice.<h4>Methods</h4>Electronic health records of clinically diagnosed onychomycosis patients were extracted using DataDerm - a dermatology data registry hosted by the American Academy of Dermatology - spanning from the year 2016 to 2022.<h4>Results</h4>Regardless of age, an increasing trend in patient volume was observed in the Southern US region, which accounted for 50.7-56.9% of onychomycosis patients in 2022. A coinfection of tinea pedis was present among 15.6-22.5% of patients. Diagnostic testing was infrequently utilized with less than one-quarter of patients having a histopathologic examination (12.7-21.9%) followed by fungal culture (5.5-8.2%) and direct microscopic examination (3.3-6.0%Skin appendage disorders36-44https://www.ebi.ac.uk/biostudies/studies/S-EPMC11793902biostudies-literaturePatient Characteristics, Diagnostic Testing Utilization, and Antifungal Prescribing Pattern for Onychomycosis in the USA: A Cohort Study Using DataDerm, 2016-2022.PMC11793902Gupta AKWang TTran ANfalsePatient Characteristics, Diagnostic Testing Utilization, and Antifungal Prescribing Pattern for Onychomycosis in the USA: A Cohort Study Using DataDerm, 2016-2022.<h4>Introduction</h4>Onychomycosis is a complex nail disease that is commonly seen in daily practice.<h4>Methods</h4>Electronic health records of clinically diagnosed onychomycosis patients were extracted using DataDerm - a dermatology data registry hosted by the American Academy of Dermatology - spanning from the year 2016 to 2022.<h4>Results</h4>Regardless of age, an increasing trend in patient volume was observed in the Southern US region, which accounted for 50.7-56.9% of onychomycosis patients in 2022. A coinfection of tinea pedis was present among 15.6-22.5% of patients. Diagnostic testing was infrequently utilized with less than one-quarter of patients having a histopathologic examination (12.7-21.9%) followed by fungal culture (5.5-8.2%) and direct microscopic examination (3.3-6.0%2025-01-01T00:00:00Z2025 Feb2026-06-10T09:05:06.526Z2026-06-10T03:11:26.738ZS-EPMC117939023991198010.1159/000540704