Pt. comes into hospital from nursing home 1 week after a fall for an open reduction and internal fixation of her trochanteric fracture of the femur. Which ICD 9 code should I use? I chose the 820.30 and was incorrect. The other codes given were 820.20, 821.39, 821.00. They want the most specific code for the higher reimbursement. Please help. It's concerning HCC coding.