M02.369
Reiter's disease, unspecified knee
Clinical Classification Guidelines
Medical Intelligence & Overview
Reiter's disease, also known as reactive arthritis, is a form of inflammatory arthritis that typically develops after an infection elsewhere in the body. When it affects the knee, it can cause pain, swelling, and reduced mobility, impacting daily activities. ICD-10 code M02.369 specifically refers to cases where Reiter's disease affects an unspecified knee. Although this condition can involve multiple joints, focus on the knee is common due to its weight-bearing role and frequent involvement.
Causes & Symptoms
Clinical Causes: Infection with certain bacteria, often following gastrointestinal or urogenital infections, such as Chlamydia trachomatis, Salmonella, Shigella, or Yersinia. Genetic predisposition, especially the presence of the HLA-B27 gene, which increases susceptibility. Environmental factors and immune system responses that trigger an abnormal inflammatory process. History of recent infections or illnesses typically preceding the joint symptoms.
Key Symptoms: Pain, tenderness, and swelling in the knee joint. Stiffness and difficulty moving the affected knee, especially after periods of inactivity. Redness and warmth over the joint area. Possible accompanying symptoms such as urinary or gastrointestinal symptoms depending on the infection that triggered the process. General signs of inflammation like fever, fatigue, and malaise may be present in some cases.
Diagnostic & Treatment
Diagnosis Path: Diagnosing Reiter's disease involves a combination of medical history, physical examination, and laboratory tests. Healthcare providers typically look for signs of joint inflammation coupled with recent or current infections. Blood tests may include checking for HLA-B27 antigen and markers of inflammation, such as ESR or CRP. Joint fluid analysis can help rule out other causes of arthritis. Imaging studies, like X-rays or MRI, may be performed to assess joint damage or inflammation extent.
Treatment Protocols: Management focuses on alleviating symptoms and controlling inflammation. Typical treatment strategies include:
Clinical Advice & FAQs
Billing Guidance
Is M02.369 a billable ICD-10 code?
Yes, M02.369 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report M02.369?
Clinical documentation must specify the nature of Reiter's disease, unspecified knee and any associated comorbidities for accurate reporting.
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