Power of Attorney for Section 16 Reporting

This document is a Power of Attorney filed by Richard Heppenstall, CFO and Treasurer of CARLSMED, INC., appointing Michael Cordonnier and Jennifer Kamocsay as his attorneys-in-fact. The attorneys-in-fact are authorized to execute and file Forms 3, 4, and 5, and any other required reports related to Heppenstall's ownership, acquisition, or disposition of the Company's securities, in accordance with Section 16(a) of the Securities Exchange Act of 1934. This power of attorney remains effective until Heppenstall is no longer required to file such forms, or until earlier revoked. The filing is dated September 28, 2026.