M02.361
Reiter's disease, right knee
Clinical Classification Guidelines
Medical Intelligence & Overview
Reiter's disease, also known as reactive arthritis, is an inflammatory condition that develops as a reaction to an infection in another part of the body. When it affects the right knee, it can cause pain, swelling, and stiffness, impacting daily activities. This condition often involves inflammation of the joints, eyes, and urinary tract, and is characterized by a combination of symptoms that may appear weeks after an initial infection. Recognizing the signs early can help manage symptoms effectively and prevent potential complications.
Causes & Symptoms
Clinical Causes: Infections caused by bacteria such as Chlamydia trachomatis (sexually transmitted), Salmonella, Shigella, Yersinia, and Campylobacter (foodborne or waterborne). Genetic predisposition, particularly the presence of the HLA-B27 gene, which increases susceptibility. Immune system reactions to previous infections that trigger joint inflammation.
Key Symptoms: Joint pain, swelling, and tenderness in the affected knee (right knee in this case). Inflammation of tendons and ligaments around the joint. Conjunctivitis or eye redness and irritation. Urinary symptoms such as pain or discomfort during urination, and sometimes urethritis. Skin rashes or ulcers, often on the soles of the feet or palms of the hands. Fever and malaise during the initial phase of the disease.
Diagnostic & Treatment
Diagnosis Path: Physical examination to evaluate joint swelling, tenderness, and range of motion. Laboratory tests including blood tests to detect inflammation (e.g., ESR, CRP) and the presence of HLA-B27 gene. Joint fluid analysis to rule out other causes of arthritis, such as gout or septic arthritis. Urinalysis to check for urinary symptoms and rule out infections. Cultures or PCR tests to identify causative bacterial infections, especially if there is a history of recent infection.
Treatment Protocols: Nonsteroidal anti-inflammatory drugs (NSAIDs) to reduce pain and swelling. Physical therapy exercises to maintain joint function and mobility. Corticosteroids, administered orally or through injections, for severe inflammation. Antibiotics, if an active bacterial infection is identified and ongoing. Immunosuppressive or disease-modifying drugs in persistent or severe cases. Rest and activity modification to prevent further joint stress.
Clinical Advice & FAQs
Billing Guidance
Is M02.361 a billable ICD-10 code?
Yes, M02.361 is a specific, billable code that can be used to indicate a diagnosis for reimbursement purposes.
Documentation
How do I report M02.361?
Clinical documentation must specify the nature of Reiter's disease, right knee and any associated comorbidities for accurate reporting.
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