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    OpenPayerBilling CodesInfectious arthropathiesICD-10-CM m01-direct-infections-of-joint
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    ICD-10-CM Code For Direct Infections Of Joint In Infectious And Parasitic Diseases Classified Elsewhere: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M01 includes septic or infectious involvement of joints that are directly attributable to infectious and parasitic diseases classified elsewhere, such as infections caused by bacteria, fungi, or parasites that extend to synovial structures. These ICD-10-CM diagnosis codes are used to document clinical scenarios where a systemic or localized infection directly involves a joint, capturing disease severity, anatomical involvement, and associated complications. Accurate coding within the ICD-10-CM M01 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM M01: Direct Infections Of Joint In Infectious And Parasitic Diseases Classified Elsewhere Overview

    The diagnoses in this group represent joint infections that occur as a result of infectious or parasitic diseases classified elsewhere in the International Classification of Diseases, Tenth Revision, Clinical Modification. These conditions target the musculoskeletal system, specifically synovial joints and periarticular structures. Accurate coding matters for clinical documentation and reimbursement because it links the joint infection to the underlying infectious etiology and supports appropriate claim adjudication.

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    When to Use

    Use a code from this group when clinical documentation indicates that a joint infection is a direct consequence of an identified infectious or parasitic disease classified elsewhere in the International Classification of Diseases, Tenth Revision, Clinical Modification. Codes in this group apply when the record specifies the causative organism or refers to an underlying infectious condition that involves the joint.

    ICD-10-CM Codes

    24 rows

    ICD-10-CM CodeDescription
    M01.X0Direct infection of unspecified joint in infectious and parasitic diseases classified elsewhere
    M01.X11Direct infection of right shoulder in infectious and parasitic diseases classified elsewhere
    M01.X12Direct infection of left shoulder in infectious and parasitic diseases classified elsewhere
    M01.X19Direct infection of unspecified shoulder in infectious and parasitic diseases classified elsewhere
    M01.X21Direct infection of right elbow in infectious and parasitic diseases classified elsewhere
    M01.X22Direct infection of left elbow in infectious and parasitic diseases classified elsewhere
    M01.X29Direct infection of unspecified elbow in infectious and parasitic diseases classified elsewhere
    M01.X31Direct infection of right wrist in infectious and parasitic diseases classified elsewhere
    M01.X32Direct infection of left wrist in infectious and parasitic diseases classified elsewhere
    M01.X39Direct infection of unspecified wrist in infectious and parasitic diseases classified elsewhere
    M01.X41Direct infection of right hand in infectious and parasitic diseases classified elsewhere
    M01.X42Direct infection of left hand in infectious and parasitic diseases classified elsewhere
    M01.X49Direct infection of unspecified hand in infectious and parasitic diseases classified elsewhere
    M01.X51Direct infection of right hip in infectious and parasitic diseases classified elsewhere
    M01.X52Direct infection of left hip in infectious and parasitic diseases classified elsewhere
    M01.X59Direct infection of unspecified hip in infectious and parasitic diseases classified elsewhere
    M01.X61Direct infection of right knee in infectious and parasitic diseases classified elsewhere
    M01.X62Direct infection of left knee in infectious and parasitic diseases classified elsewhere
    M01.X69Direct infection of unspecified knee in infectious and parasitic diseases classified elsewhere
    M01.X71Direct infection of right ankle and foot in infectious and parasitic diseases classified elsewhere

    Showing 1–20 of 24

    DRG Codes

    6 rows

    DRG CodeDescription
    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
    548Septic Arthritis with MCC
    549Septic Arthritis with CC
    550Septic Arthritis without CC/MCC

    Typical Clinical Scenarios

    • An elderly patient with sudden onset of severe monoarticular knee pain, swelling, warmth, and fever presents to the emergency department after acute limitation of weight-bearing. Joint aspiration yields purulent fluid with Gram-positive cocci on Gram stain and subsequent culture grows Staphylococcus aureus, prompting diagnosis of a bacterial septic arthritis directly infecting the joint. Typical codes: M01.X11, M01.X19
    • A young adult with a history of untreated gonococcal urethritis develops migratory polyarthralgia and acute purulent arthritis of the wrist and ankle; synovial fluid culture (or nucleic acid testing) confirms Neisseria gonorrhoeae as the causative organism, leading to coding for an infectious arthropathy due to a sexually transmitted bacterial infection. Typical codes: M01.X21, M01.X29
    • A patient with chronic rheumatoid arthritis on long-term immunosuppression presents with subacute shoulder pain and decreased range of motion; imaging shows joint effusion and synovial biopsy reveals fungal elements consistent with a deep fungal infection of the joint as a complication of their immunocompromised state. Typical codes: M01.X61, M01.X69

    Related Codes

    M00-PYOGENIC-ARTHRITIS

    ICD-10-CM Code For Pyogenic Arthritis: Group Overview

    M02-POSTINFECTIVE-AND-REACTIVE-ARTHROPATHIES

    ICD-10-CM Code For Postinfective And Reactive Arthropathies: 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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