We sought to evaluate the clinical and radiographic outcomes in patients treated with a medial displacement transverse osteotomy of the second metatarsal to correct transverse hammer toe deformities. Eighteen patients underwent 20 procedures in 3 years. Each patient had a transverse plane deformity of the second metatarsophalangeal joint. Evaluation consisted of clinical examination, radiographic examination, and self-reported pain and function parameters. Mean +/- SD follow-up was 2.5 +/- 1.0 years. Radiographic joint congruence improved from 20% before surgery to 95% after surgery. Clinical examination revealed a rectus digit in 85% of cases, a transverse plane deviation in 10%, and a residual hammer toe deformity in 5%. At follow-up, the mean +/- SD visual analog scale score for pain with activity was 2.2 +/- 2.8 and for pain at rest was 0.6 +/- 1.4. Ninety-five percent of the patients said that they would undergo the procedure again. Medial displacement osteotomy for transverse plane deformity of the second metatarsophalangeal joint is a reliable procedure, with substantial improvement in joint congruence and self-reported pain.