ICD-10 Code M02.171 – Postdysenteric arthropathy, right ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.171 – Postdysenteric arthropathy, right ankle and foot
What it is
This code identifies reactive joint disease affecting the right ankle and foot after a dysenteric infection. It indicates postinfectious arthritis linked to prior intestinal illness, not a primary joint disorder.
Clinical signs
Typical findings include pain, swelling, stiffness, and reduced motion in the right ankle or foot. Clinical features vary; refer to documentation for evidence of a recent or prior dysenteric infection.
When to use this code
Use M02.171 when the clinician documents postdysenteric arthropathy specifically involving the right ankle and foot. The record should connect the joint problem to a preceding dysenteric illness. If laterality or the postinfectious cause is unclear, check documentation before coding.
Do not use for
Do not use this code for unspecified ankle or foot arthritis, traumatic joint injury, or gout. It is also inappropriate when the joint condition is not documented as postdysenteric.
Coding tip
Verify both the causal infection and the right-sided joint site in the note before assigning M02.171.