ICD-10 Code M00.12 – Pneumococcal arthritis, elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.12 – Pneumococcal arthritis, elbow
What it is
M00.12 identifies a pneumococcal infection of the elbow joint causing septic arthritis. Use it when Streptococcus pneumoniae is documented as the organism affecting that joint.
Clinical signs
Typical findings include an acutely painful, swollen, warm elbow with limited range of motion. Fever may occur, and clinical features vary; refer to documentation.
When to use this code
Use this code when the record clearly states pneumococcal septic arthritis involving the elbow. It applies when the provider documents the organism and joint site, or when culture or clinical assessment supports that diagnosis. Check documentation if the site is unclear.
Do not use for
Do not use M00.12 for arthritis without infection, or for septic arthritis caused by another organism. If the elbow is not specified, or pneumococcus is not documented, check documentation.
Coding tip
Verify both the causative organism and the elbow site before assigning M00.12.