A 24-year-old man with HIV who has sex only with women is seen for evaluation of dysuria and a clear urethral discharge. He is treated empirically with ceftriaxone and doxycycline. Two days later, gonorrhea and chlamydia with nucleic acid amplification tests (NAATs) are negative. He returns 2 weeks later with persistent symptoms and reports no new sex partners since the prior clinic visit. Testing for Mycoplasma genitalium with NAAT is positive. Resistance testing for M. genitalium is not available.