In ICD-10-CM diabetes coding (as reinforced in outpatient CDI education), some diabetes manifestations are fully captured by a single diabetes ''combination'' code, while others require a diabetes complication code plus an additional code to identify the specific manifestation. Diabetic nephropathy and many forms of diabetic retinopathy are commonly represented by diabetes combination codes that already describe the manifestation with built-in specificity options (e.g., diabetes with nephropathy; diabetes with retinopathy with/without macular edema and severity). Osteomyelitis, however, is typically captured using a diabetes code such as ''diabetes with other specified complication'' (e.g., E11.69) to establish the linkage to diabetes and an additional code from the osteomyelitis category (e.g., M86.-) to specify the site, acuity, and type of osteomyelitis. From a chart review standpoint, CDI often queries to confirm the causal relationship (''due to diabetes'') and to ensure the osteomyelitis details (site, acute vs chronic) are documented so both codes can be assigned accurately and compliantly.