In ICD-10-CM code book, osteomyelitis, M86, is subdivided into these body areas: shoulder humerus radius and ulna hand femur tibia and fibula ankle and foot multiple sites then each is further subdivided by: acuity (acute, subacute or chronic) and laterality (left or right) Use additional code (B95-B97) to identify infectious agent and any major osseous defect, if applicable (M89.7-) Disclaimer: This guidance is to be used for an easy reference; the ICD-9-CM and ICD-10-CM code books and the Official Guidelines for Coding and Reporting are the authoritative references for accurate and complete coding. This blog may contain references or links to statutes, regulations, or other policy materials. It is not intended to take the place of either the written law or regulations. The information presented h...