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    OpenPayerBilling CodesInflammatory polyarthropathiesICD-10-CM m05-rheumatoid-arthritis-with-rheumatoid-factor
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    ICD-10-CM Code For Rheumatoid Arthritis With Rheumatoid Factor: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group M05 includes rheumatoid arthritis diagnoses characterized by the presence of rheumatoid factor, covering seropositive rheumatoid arthritis with various joint involvement and potential extra-articular manifestations. These ICD-10-CM diagnosis codes are used to document clinical scenarios that capture disease severity, pattern of joint involvement, and systemic complications associated with seropositive rheumatoid arthritis. Accurate coding within the ICD-10-CM M05 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

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    ICD-10-CM M05: Rheumatoid Arthritis With Rheumatoid Factor Overview

    The ICD-10-CM M05 code group represents rheumatoid arthritis with documented rheumatoid factor positivity, an inflammatory autoimmune condition primarily affecting synovial joints and sometimes extra-articular organs. These diagnoses target the musculoskeletal system and related systemic manifestations. Accurate coding matters for reimbursement because specificity influences claim adjudication and reflects clinical complexity.

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    When to Use

    Use a code from the ICD-10-CM M05 group when the medical record documents rheumatoid arthritis with a positive rheumatoid factor and specifies joint or extra-articular involvement. Select the most specific code reflecting the site, laterality, and any documented manifestations to ensure accurate representation of the clinical condition.

    ICD-10-CM Codes

    211 rows

    ICD-10-CM CodeDescription
    M05.00Felty's syndrome, unspecified site
    M05.011Felty's syndrome, right shoulder
    M05.012Felty's syndrome, left shoulder
    M05.019Felty's syndrome, unspecified shoulder
    M05.021Felty's syndrome, right elbow
    M05.022Felty's syndrome, left elbow
    M05.029Felty's syndrome, unspecified elbow
    M05.031Felty's syndrome, right wrist
    M05.032Felty's syndrome, left wrist
    M05.039Felty's syndrome, unspecified wrist
    M05.041Felty's syndrome, right hand
    M05.042Felty's syndrome, left hand
    M05.049Felty's syndrome, unspecified hand
    M05.051Felty's syndrome, right hip
    M05.052Felty's syndrome, left hip
    M05.059Felty's syndrome, unspecified hip
    M05.061Felty's syndrome, right knee
    M05.062Felty's syndrome, left knee
    M05.069Felty's syndrome, unspecified knee
    M05.071Felty's syndrome, right ankle and foot

    Showing 1–20 of 211

    • More pages

    DRG Codes

    6 rows

    DRG CodeDescription
    196Interstitial Lung Disease with MCC
    197Interstitial Lung Disease with CC
    198Interstitial Lung Disease without CC/MCC
    545Connective Tissue Disorders with MCC
    546Connective Tissue Disorders with CC
    547Connective Tissue Disorders without CC/MCC

    Typical Clinical Scenarios

    • A middle-aged woman with known seropositive rheumatoid arthritis presents to clinic with increased symmetrical swelling, pain, and morning stiffness in her hands and wrists over several weeks despite adjustment of outpatient therapy; physical exam shows synovitis of multiple small joints and laboratory tests confirm positive rheumatoid factor. This represents an exacerbation of chronic inflammatory polyarthritis requiring assignment of a rheumatoid factor–positive rheumatoid arthritis code reflecting involvement of multiple sites. Typical codes: M05.00, M05.09
    • An elderly man arrives to the emergency department with acute-onset severe polyarticular pain, fever, and rapidly progressive joint swelling and decreased mobility; workup excludes septic arthritis and demonstrates high inflammatory markers and positive rheumatoid factor consistent with a flare of seropositive rheumatoid arthritis causing systemic symptoms. In this acute presentation requiring urgent management, a code from this group is used to capture rheumatoid arthritis with rheumatoid factor during the current flare. Typical codes: M05.10, M05.19
    • A young adult with longstanding rheumatoid factor–positive rheumatoid arthritis is seen for routine care after developing rheumatoid nodules and chronic deforming changes with limited hand function and documented erosive disease on imaging; the visit documents chronic complications and ongoing active disease management. This chronic comorbidity and structural joint damage in a seropositive patient is coded using a rheumatoid arthritis with rheumatoid factor code that reflects chronicity and joint involvement. Typical codes: M05.31, M05.39

    Related Codes

    M06-OTHER-RHEUMATOID-ARTHRITIS

    ICD-10-CM Code For Other Rheumatoid Arthritis: Group Overview

    M07-ENTEROPATHIC-ARTHROPATHIES

    ICD-10-CM Code For Enteropathic Arthropathies: Group Overview

    M08-JUVENILE-ARTHRITIS

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

    M10-GOUT-AND-RELATED-ARTHROPATHIES

    ICD-10-CM Code For Gout: Group Overview

    M11-OTHER-CRYSTAL-ARTHROPATHIES

    ICD-10-CM Code For Other Crystal Arthropathies: Group Overview

    M12-OTHER-AND-UNSPECIFIED-ARTHROPATHY

    ICD-10-CM Code For Other And Unspecified Arthropathy: Group Overview

    M13-OTHER-ARTHRITIS

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

    M14-ARTHROPATHIES-IN-OTHER-DISEASES

    ICD-10-CM Code For Arthropathies In Other 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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