ICD-10 Code M00.131 – Pneumococcal arthritis, right wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.131 – Pneumococcal arthritis, right wrist
What it is
M00.131 identifies septic arthritis of the right wrist caused by pneumococcal infection. Use it when documentation specifies Streptococcus pneumoniae as the organism affecting that joint.
Clinical signs
Typical findings include a painful, swollen, warm wrist with reduced range of motion. Fever and systemic illness may occur, but clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents pneumococcal septic arthritis limited to the right wrist. It is appropriate for confirmed or clearly documented infection of that joint by pneumococcus. If the record names only “infectious arthritis” without the organism, check documentation before assigning M00.131.
Do not use for
Do not use it for arthritis in another wrist or joint, or for noninfectious inflammatory arthritis. Avoid this code if pneumococcal infection is documented elsewhere without right wrist joint involvement.
Coding tip
Verify both the organism and the right wrist site in the note before coding M00.131.