For the ICD10 codes:
M86.0 - for acute hematogenous osteomyelitis
M86.1 - for other acute osteomyelitis
M86.2 - for sub-acute osteomyelitis
M86.3 - for chronic multifocal osteomyelitis
M86.4 - for chronic osteomyelitis with draining sinus
M86.5 - for other chronic hematogenous osteomyelitis
M86.6 - for other chronic osteomyelitis
and actually there are others
For the ICD9 codes:
730.1 - for chronic osteomyelitis
I do not believe ICD-9 codes are used any longer