ICD-10 Code M00.27 – Other streptococcal arthritis, ankle and foot (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.27 – Other streptococcal arthritis, ankle and foot
What it is
This code identifies a streptococcal infection causing arthritis in the ankle or foot joints. Use it when the documentation specifies streptococcal septic arthritis and the site is the ankle or foot.
Clinical signs
Typical findings include a painful, swollen, warm joint with reduced range of motion. Clinical features vary; refer to documentation for the specific streptococcal cause and affected joint.
When to use this code
Use M00.27 when the provider documents other streptococcal arthritis affecting the ankle or foot. It fits cases described as septic arthritis, infectious arthritis, or pyogenic arthritis when streptococcal infection is confirmed or stated. Check documentation if the organism or joint site is unclear.
Do not use for
Do not use this code for noninfectious arthritis, gout, or arthritis in another joint. If the record does not specify streptococcal infection or ankle/foot involvement, check documentation.
Coding tip
Confirm both the organism and the joint location in the provider note before assigning M00.27.