"Contributions you make to a health savings account (HSA) are also deductible "above-the-line." An HSA is a tax-exempt trust or custodial account you can establish in conjunction with a high-deductible health plan to set aside funds for health-care expenses."
-https://www.ameriprise.com/research-market-insights/tax-center/tax-planning/self-employment-tax/
Never-mind, Google is a wonderful thing