ICD-10 Code M00.812 – Arthritis due to other bacteria, left shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M00.812 – Arthritis due to other bacteria, left shoulder
What it is
This code identifies bacterial arthritis affecting the left shoulder joint when the organism is not otherwise specified in a more precise code. It indicates an infectious joint process, not a chronic degenerative arthritis.
Clinical signs
Typical findings include acute shoulder pain, swelling, warmth, and reduced range of motion. Fever may occur, but clinical features vary; refer to documentation.
When to use this code
Use M00.812 when the record documents bacterial arthritis in the left shoulder and the causative organism is classified as “other bacteria” or otherwise matches this category. You should code from provider documentation, imaging, aspiration, or culture results when available. If the shoulder is not specified as left, do not assume this code.
Do not use for
Do not use this code for noninfectious arthritis, osteoarthritis, or shoulder pain without documented bacterial joint infection. Check documentation if the organism or laterality is unclear.
Coding tip
Confirm both laterality and infectious cause before assigning M00.812.