OBJECTIVES Patient age is one of many potential risk factors for fracture nonunion.  We evaluate impact of age on heal rate (HR) in patients with fresh fracture (≤90 days old).  Our hypothesis is that age is not a risk factor for nonunion if fractures are treated with LIPUS. METHODS A LIPUS device was approved in 1994 to accelerate fresh fracture healing, though the FDA required a Post-Market Registry.  Patient data were collected from October 1994 until October 1998 and were reviewed and validated by a registered nurse.  We required 4 data elements to report a patient:  date when fracture occurred; date when treatment began; date when treatment ended; and outcome (healed vs. failed, by clinical and radiological criteria).  Data were used to calculate: days to treatment (DTT); and days on treatment (DOT).  All fresh fractures with DTT, DOT, and outcome are reported. RESULTS