Exhibit 99.1 iRhythm Technologies Announces First Quarter 2024 Financial Results SAN FRANCISCO, May 2, 2024 - iRhythm Technologies, Inc. (NASDAQ: IRTC), a leading digital health care company focused on creating trusted solutions that detect, predict, and prevent disease, today reported financial results for the three months ended March 31, 2024. First Quarter 2024 Financial Highlights • Revenue of $131.9 million, a 18.4% increase compared to first quarter 2023 • Gross margin of 66.3%, a 160-basis point decl ...