Aframian, Kimiya R.

Abstract Mohs Surgery from 2016 to 2022: Declining Medicaid Reimbursement and ACA Expansion Impact Mohs micrographic surgery (MMS) is the standard of care for many nonmelanoma skin cancers, yet access remains highly variable due to low reimbursement rates. Only 39.5% of Mohs surgeons nationally accept Medicaid. While the Affordable Care Act (ACA) Medicaid expansion improved coverage for low-income adults, its effects on dermatologic reimbursement remain unclear. This study provides the first comprehensive analysis of inflation-adjusted Medicaid reimbursement trends for MMS and determines whether ACA Medicaid expansion translated into improved payment rates. Average physician reimbursement per patient for MMS procedures (CPT codes 17311–17314) from 2016 to 2022 was extracted from a large insurance claims database and adjusted for inflation to 2022 U.S. dollars. States were categorized by Medicaid expansion status, and linear regression assessed reimbursement trends. Between 2016 and 2022, national weighted average reimbursement for MMS first stage (CPT 17311) declined 18.33%, while MMS additional stages (CPT 17312) decreased 25.52% (p = 0.0182). When stratified by expansion status, CPT 17311 reimbursement declined − 5.71% in expansion states versus increasing + 5.80% in non-expansion states (p = 0.00121). Reimbursement for non-high-risk anatomic areas declined 26.10% and 32.6%, respectively. Inflation-adjusted Medicaid payments for MMS declined substantially from 2016 to 2022, with greater reductions in Medicaid expansion states. While ACA expansion increased coverage, it introduced financial pressures through lower fee schedules, potentially threatening physician participation and access to essential dermatologic surgery for vulnerable populations.