Changes in dermatology practice characteristics in the United States from 2012 to 2017

Dermatology practice has recently seen multiple changes. A better understanding of trends pertaining to dermatology practice setups is necessary.

To analyze the recent changes in dermatology practice in terms of geography, practice size, and gender distribution as well as to analyze the availability of dermatologists based on zip codes' income levels.

This was a cross-sectional study. We extracted data on the sex and billing addresses of dermatologists from Medicare provider utilization and payment data for 2012 and 2017. We used 2017 tax returns data to calculate the poverty level for each zip code.

Between 2012 and 2017, the number of solo practitioners decreased, while that of dermatologists working in large groups increased. The southern region experienced the largest changes. The male-to-female ratio decreased. Dermatology practices mainly comprised mixed genders, with a higher proportion of all-male groups versus that of all-female groups, but this difference decreased over time. In the northeastern and western regions, more than one third of dermatologists were located in the wealthiest zip codes.

The Medicare data may not be exhaustively representative of the dermatology workforce, and the zip codes of 489 dermatologists' billing addresses were missing in the tax return dataset.

These findings provide an understanding of the recent changes pertaining to dermatology practice setups and of the substantial health care disparities based on geographic distribution.