ICD-10 Code M02.871 – Other reactive arthropathies, right ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M02.871 – Other reactive arthropathies, right ankle and foot
What it is
M02.871 identifies a reactive arthropathy affecting the right ankle and foot. It is used when joint inflammation is linked to a prior infection or another reactive process, and the site is specifically the right ankle and foot.
Clinical signs
Typical findings include joint pain, swelling, stiffness, and reduced range of motion in the affected area. Clinical features vary; refer to documentation for the underlying trigger and whether other joints are involved.
When to use this code
Use this code when the provider documents reactive arthropathy or reactive arthritis in the right ankle and foot. It is appropriate when the record clearly identifies the anatomic site and does not specify a different reactive arthropathy code. If the note only mentions postinfectious joint symptoms without a confirmed diagnosis, check documentation.
Do not use for
Do not use this code for nonspecific ankle pain, osteoarthritis, or gout without documentation of reactive arthropathy. Also avoid it when the affected side or location is different, or when the condition is described only as suspected.
Coding tip
Confirm both laterality and the exact joint location in the provider note before assigning M02.871.