Table 1.

ICD-9 codes to identify AHO and septic arthritis

ICD-9 Code	Diagnosis
Osteomyelitis codes
730	Acute osteomyelitis
730.0	Acute osteomyelitis
730.2	Unspecified osteomyelitis
730.8	Other infections involving the bone in diseases classified elsewhere
730.9	Unspecified infection of bone
Septic arthritis codes
711.0	Pyogenic arthritis
711.4	Arthropathy associated with other bacterial diseases
711.8	Arthropathy associated with infection and other parasitic disease
711.9	Unspecified infective arthritis
713.7	Other general diseases with articular involvement
713.8	Arthropathy associated with other conditions classified elsewhere