ICD-10 Code M00.271 – Other streptococcal arthritis, right ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.271 – Other streptococcal arthritis, right ankle and foot
What it is
This code identifies acute streptococcal infection of the right ankle and foot joint. Use it when documentation states streptococcal arthritis affecting that specific side and site.
Clinical signs
Typical findings include a painful, swollen, warm joint with reduced range of motion. Fever may occur, and clinical features vary; refer to documentation for the organism and affected joint.
When to use this code
Assign this code when the provider documents streptococcal arthritis in the right ankle or foot and does not specify a more exact streptococcal type. Use the code only for the right-sided ankle/foot joint involvement described in the record.
If the note says septic arthritis without identifying streptococcal cause, check documentation before coding M00.271. Also confirm the condition is infectious arthritis, not gout, osteoarthritis, or another noninfectious joint disorder.
Do not use for
Do not use this code for left-sided or unspecified ankle and foot arthritis, or for nonstreptococcal joint infection. Check documentation if the record describes another organism or a noninfectious arthritis.
Coding tip
Verify both the organism and the laterality before assigning M00.271.