The importance of the timing of therapeutic intervention to the results of zone II flexor tendon repairs was retrospectively studied. Twenty-two patients were categorized as having had either early intervention (referral within the first postoperative week) or delayed intervention (referral between 1 and 3 weeks postoperatively). Patients followed a combined Kleinert/Duran program. Patients' results were calculated according to Strickland's formula for total active range of motion. In the early intervention group, 60% of the results were excellent and 40% were good; there were no fair or poor results. In the delayed intervention group, 50% of the results were excellent, 25% were good, 17% were fair, and 8% were poor. The difference between the two groups was not statistically significant. However, these results are clinically significant because a fair or poor result would reduce the patient's use of the affected digit and could lead to further surgical intervention.