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    OpenPayerBilling CodesOther osteopathiesICD-10-CM m86-osteomyelitis
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    ICD-10-CM Code For Osteomyelitis: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M86 includes infections of bone and bone marrow such as acute and chronic osteomyelitis, vertebral osteomyelitis, and osteomyelitis with draining sinus or sequestrum that cover various anatomic sites and complication statuses. These ICD-10-CM diagnosis codes are used to document clinical scenarios including acute versus chronic infection, presence of complications like sequestrum or sinus tract, and specific anatomic location to capture disease severity and treatment complexity. Accurate coding within the ICD-10-CM M86 group supports complete clinical documentation, appropriate reimbursement, and proper claim adjudication.

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    ICD-10-CM M86: Osteomyelitis Overview

    The ICD-10-CM M86 group represents osteomyelitis diagnoses, infections of bone and bone marrow that can affect any skeletal site. These conditions target the musculoskeletal system and often require detailed documentation of acute versus chronic status, anatomic site, and associated complications. Accurate coding matters for proper reimbursement and to reflect clinical complexity for care coordination.

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    When to Use

    Use a code from this group when a documented diagnosis of osteomyelitis is present and the clinical record specifies acute versus chronic status and the anatomic site. Codes in this group are also used when complications such as draining sinus, sequestrum, or vertebral involvement are documented.

    ICD-10-CM Codes

    179 rows

    ICD-10-CM CodeDescription
    M86.00Acute hematogenous osteomyelitis, unspecified site
    M86.011Acute hematogenous osteomyelitis, right shoulder
    M86.012Acute hematogenous osteomyelitis, left shoulder
    M86.019Acute hematogenous osteomyelitis, unspecified shoulder
    M86.021Acute hematogenous osteomyelitis, right humerus
    M86.022Acute hematogenous osteomyelitis, left humerus
    M86.029Acute hematogenous osteomyelitis, unspecified humerus
    M86.031Acute hematogenous osteomyelitis, right radius and ulna
    M86.032Acute hematogenous osteomyelitis, left radius and ulna
    M86.039Acute hematogenous osteomyelitis, unspecified radius and ulna
    M86.041Acute hematogenous osteomyelitis, right hand
    M86.042Acute hematogenous osteomyelitis, left hand
    M86.049Acute hematogenous osteomyelitis, unspecified hand
    M86.051Acute hematogenous osteomyelitis, right femur
    M86.052Acute hematogenous osteomyelitis, left femur
    M86.059Acute hematogenous osteomyelitis, unspecified femur
    M86.061Acute hematogenous osteomyelitis, right tibia and fibula
    M86.062Acute hematogenous osteomyelitis, left tibia and fibula
    M86.069Acute hematogenous osteomyelitis, unspecified tibia and fibula
    M86.071Acute hematogenous osteomyelitis, right ankle and foot

    Showing 1–20 of 179

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    DRG Codes

    9 rows

    DRG CodeDescription
    456Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with MCC
    457Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions with CC
    458Spinal Fusion Except Cervical with Spinal Curvature, Malignancy, Infection or Extensive Fusions without CC/MCC
    485Knee Procedures with Principal Diagnosis of Infection with MCC
    486Knee Procedures with Principal Diagnosis of Infection with CC
    487Knee Procedures with Principal Diagnosis of Infection without CC/MCC
    539Osteomyelitis with MCC
    540Osteomyelitis with CC
    541Osteomyelitis without CC/MCC

    Typical Clinical Scenarios

    • An adult patient presents to the emergency department with acute onset of severe localized bone pain, swelling, erythema, fever, and purulent drainage from a recent open fracture site after a motor vehicle collision. Imaging (MRI) demonstrates marrow edema and cortical destruction consistent with acute osteomyelitis at the fracture location; blood cultures are pending and IV antibiotics are started. A code from this group is assigned for acute posttraumatic bone infection at the specific site. Typical codes: M86.011, M86.019
    • A middle-aged patient with poorly controlled diabetes and peripheral neuropathy reports a chronic, nonhealing plantar foot ulcer for several months with new increased pain and intermittent drainage; probe-to-bone testing and MRI confirm chronic osteomyelitis of the distal phalanx/forefoot. This chronic, long-standing bone infection related to a contiguous soft-tissue ulcer warrants a code from the group indicating chronic osteomyelitis of the specified foot bone. Typical codes: M86.171, M86.179
    • An elderly patient in a long-term care facility with recent hip arthroplasty develops low-grade fever, persistent wound drainage, and loosening of the prosthesis on radiographs several weeks after surgery. Surgical exploration and cultures confirm osteomyelitis involving the prosthetic adjacent bone as a complication of the recent orthopedic procedure, so a postprocedural/complicated bone infection code from the group is used. Typical codes: M86.041, M86.049

    Related Codes

    M87-OSTEONECROSIS

    ICD-10-CM Code For Osteonecrosis: Group Overview

    M88-OSTEITIS-DEFORMANS-PAGETS-DISEASE

    ICD-10-CM Code For Osteitis Deformans Paget's Disease Of Bone: Group Overview

    M89-OTHER-DISORDERS-OF-BONE

    ICD-10-CM Code For Other Disorders Of Bone: Group Overview

    M90-OSTEOPATHIES-IN-DISEASES-CLASSIFIED-ELSEWHERE

    ICD-10-CM Code For Osteopathies In Diseases Classified Elsewhere: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
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