Table 3.

Ten most frequent ICD-9 principal diagnoses and procedures in the Other category

ICD-9 Principal Diagnosis	n
Immune thrombocytopenic purpura	252
Epistaxis	195
Anomalies of skull and face bones	130
Hemorrhage complicating a procedure	127
Qualitative platelet defects	111
Scoliosis [and kyphoscoliosis], idiopathic	100
Encounter for antineoplastic chemotherapy	96
Excessive or frequent menstruation	89
Dental caries, unspecified	79
Other anomalies of larynx, trachea, and bronchus	74
ICD-9 Principal Procedure	n
Transfusion of packed cells	330
Injection or infusion of immunoglobulin	110
Bilateral lung transplantation	99
Internal fixation of bone without fracture reduction, other bones	93
Transfusion of platelets	91
Graft of muscle or fascia	83
Continuous invasive mechanical ventilation for 96 consecutive hours or more	82
Other repair and plastic operations on trachea	81
Injection or infusion of cancer chemotherapeutic substance	69
Biopsy of bone marrow	68