e21078 Background: Mohs Micrographic Surgery (MSS) has expanded markedly in recent years but there is limited information on volume, practice patterns, compensation or comparative effectiveness data to support preferential use. This study examines patterns of MSS utilization in the Medicare population. Methods: We obtained the Medicare Provider Utilization and Payment Data: Physician and Other Supplier Public Use File Calendar Year 2013dataset from CMS.gov. This contains comprehensive payment and utilization data for physician/supplier Medicare Part B Fee For Service final-action non-institutional claims in 2013. For dermatologists as a whole and the subset of dermatologist MSS surgeons, we analyzed provider service volume and reimbursement for all services as well as for malignant skin cancer procedures (destructions, excisions or MSS) in SAS 9.3. Results: Total Medicare funded MSS procedures increased 25 percent from 2009 (558,447) to 2013 (700,262). Dermatologists who performed MSS had significantly more average services per provider (5,419.4 vs. 3,627.1, r = 0.16, p < 0.0001), earned significantly more in average total procedure-related compensation ($475,883.64 vs. $144,564.74, r = 0.49, p < 0.0001) than dermatologists who did not perform MSS, and made up 71.3 percent of the top decile of dermatologists ranked by total payment received from Medicare. Total MSS service volume and compensation was concentrated among a subset of providers: the top quintile in this group (513 – 3,759 procedures) in annual procedure volume performed over 50 percent of total MSS surgeries. MSS providers with higher annual service volumes performed a greater percentage of their total MMS procedure annual totals on lesions located on the trunk, arms or legs versus the head, neck, hands, feet or genitals (r = 0.27, p < 0.001). Conclusions: Mohs Micrographic Surgery is expanding among Medicare beneficiaries. A subset of dermatologists performing MSS accounts for most services and earnings, and performs surgeries more frequently on the trunk or extremities. Further studies are needed incorporating clinical data not available in Medicare billing information to explore implications of these findings for clinical practice.
Mohs Micrographic Surgery and Surgical Excision for Nonmelanoma Skin Cancer Treatment in the Medicare Population
