This study involved a review of the medical records of 367 patients treated surgically after femoral neck fracture. Linkage of these records with claims files from the Health Care Financing Administration allowed as many as 8 years of followup to analyze the rates of hospital readmission rates for revision, other postoperative complications and mortality. The results revealed: (1) a significantly higher revision rate was associated with internal fixation for the treatment of displaced femoral neck fractures in patients older than 80 years of age; no differences in revision rates were seen between internal fixation or hemiarthroplasty for the treatment of nondisplaced femoral neck fractures in this patient age group; (2) no differences in revision rates were found between internal fixation or hemiarthroplasty for the treatment of displaced femoral neck fractures in patients between the ages of 65 to 80 years; (3) a significantly higher mortality rate was associated with internal fixation than hemiarthroplasty for patients who were between the ages of 65 and 80 years; and (4) no differences in medical or surgical complications, revision rates, or other outcomes were found between unipolar and bipolar prostheses, or between anterior and posterior surgical approaches for hemiarthroplasty in patients who were age 65 years or older.