ICD-10 Code A39.83 – Meningococcal arthritis (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code A39.83 – Meningococcal arthritis
What it is
Meningococcal arthritis is a joint infection caused by Neisseria meningitidis. It is a manifestation of invasive meningococcal disease and may occur with or without other systemic findings.
Clinical signs
Typical findings include acute joint pain, swelling, warmth, and reduced range of motion. Clinical features vary; refer to documentation, especially if the arthritis is part of a broader meningococcal infection.
When to use this code
Use A39.83 when the provider documents meningococcal arthritis, meningococcal septic arthritis, or joint involvement due to N. meningitidis. Apply it when the diagnosis is confirmed or clearly stated in the record. Check documentation if the joint problem is described only as suspected or nonspecific.
Do not use for
Do not use this code for arthritis caused by other bacteria, viral arthritis, or inflammatory arthritis without meningococcal cause. Do not assign it when meningococcal disease is not documented.
Coding tip
Look for explicit linkage between the arthritis and meningococcal infection before coding A39.83.