ICD-10-CM › M86 › M86.6 › M86.65 M86.659 Other chronic osteomyelitis, unspecified thighBillable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.
Applies from M86 Osteomyelitis Excludes1 (never code together) osteomyelitis due to: echinococcus (B67.2) gonococcus (A54.43) salmonella (A02.24) Excludes2 (not included here) ostemyelitis of: orbit (H05.0-) petrous bone (H70.2-) vertebra (M46.2-) Use additional code code (B95-B97) to identify infectious agent code to identify major osseous defect, if applicable (M89.7-) Risk adjustment (HCC) CMS-HCC V28: HCC 92 — Bone/Joint/Muscle/Severe Soft Tissue Infections/Necrosis CMS-HCC V22: HCC 39 — Bone/Joint/Muscle Infections/Necrosis ESRD V24: HCC 39 MS-DRG index Defines the logic of DRG(s) 539-541 in MDC 08.
Approximate ICD-9-CM (GEMs) 730.15 Chronic osteomyelitis, pelvic region and thigh (approximate)Medicare Code Edits (MCE v43.1 (April 2026)) Unspecified code (laterality) : Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.Code annotations containing back-references to M86.659 Back-references to M86 Code First: M89.7 Diagnosis Index entries for M86.659 Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) › chronic (or old) › ilium Osteomyelitis (general) (infective) (localized) (neonatal) (purulent) (septic) (staphylococcal) (streptococcal) (suppurative) (with periostitis) › chronic (or old) › ischium Nearby codes M86.642M86.649M86.65M86.651M86.652M86.659 Other chronic osteomyelitis, unspecified thigh (this code)M86.66M86.661M86.662M86.669M86.67