Ronan Nunes Cordeiro (born 10 August 1997) is a Brazilian paratriathlete.
Cordeiro represented Brazil at the 2024 Summer Paralympics and won a silver medal in the PTS5 event.
On 2 September 2024, Cordeiro failed a drug test during the Paris Paralympics â the paratriathlete provided an in-competition urine sample that returned an adverse analytical finding (AAF) testing positive for an anabolic androgenic steroid, 19-norandrosterone (19-NA). The International Paralympic Committee (IPC) charged Cordeiro with an anti-doping rule violation (ADRV) and he was placed on provisional suspension in October 2024. The Brazilian denied the allegation and requested a hearing before the IPC's Independent Anti-Doping Tribunal.
The hearing of Cordeiro's case took place on 28 January 2026. After reviewing the evidence, the Tribunal upheld the IPC's charge and imposed the full consequences on the basis of anti-doping rule violations.
As a result, all of Cordeiro's results from the Men's PTS5 event at Paris 2024 have been disqualified, including the forfeiture of his silver medal, as well as any associated points and prizes.