ICD-10 Code M02.169 – Postdysenteric arthropathy, unspecified knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.169 – Postdysenteric arthropathy, unspecified knee
What it is
M02.169 identifies reactive arthritis affecting the knee after dysentery, when the specific knee side is not documented. Use it for joint inflammation linked to a prior intestinal infection.
Clinical signs
Typical findings include knee pain, swelling, stiffness, and reduced range of motion after a gastrointestinal infection. Clinical features vary; refer to documentation.
When to use this code
Use this code when the record links knee arthropathy to a previous dysenteric illness and laterality is not specified. It fits encounters documenting postinfectious joint symptoms in the knee without a more specific diagnosis. If the chart names another joint or a different cause, choose a different code.
Do not use for
Do not use it for septic arthritis, osteoarthritis, or knee pain without a documented postdysenteric link. Check documentation.
Coding tip
Confirm both the prior dysentery and the unspecified knee before assigning M02.169.