ICD-10 Code M02.179 – Postdysenteric Arthropathy, Unspecified Ankle and Foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.179 – Postdysenteric arthropathy, unspecified ankle and foot
What it is
This code identifies reactive joint inflammation in the ankle or foot that occurs after dysentery. Use it when the record links the arthropathy to a prior intestinal infection and does not specify a more detailed site.
Clinical signs
Typical findings include joint pain, swelling, stiffness, and reduced range of motion in the ankle or foot. Clinical features vary; refer to documentation for the infectious history and the affected joint.
When to use this code
Use M02.179 when the provider documents postdysenteric arthropathy involving an unspecified ankle and foot, and the note supports a causal relationship to dysentery. It is appropriate when laterality or a more specific joint site is not documented. Check documentation if the arthritis is described only as reactive or postinfectious without the dysenteric link.
Do not use for
Do not use this code for septic arthritis, gout, or other non-reactive arthropathies. If the affected site or cause is documented more specifically, code that information instead.
Coding tip
Confirm both the postdysenteric cause and the ankle/foot location before assigning this code.