iRhythm (IRTC) S-8 Registration of securities for employees

Exhibit 23.1

CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We hereby consent to the incorporation by reference in this Registration Statement on FormS-8 of our report dated March 1, 2018 relating to the consolidated financial statements and the effectiveness of internal control over financial reporting, which appears in iRhythm Technologies, Inc.’s Annual Report on Form10-K for the year ended December 31, 2017.

/s/ PricewaterhouseCoopers LLP

San Jose, California

March 1, 2018