ICD-10 Code M06.012 – Rheumatoid arthritis without rheumatoid factor, left shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.012 – Rheumatoid arthritis without rheumatoid factor, left shoulder
What it is
This code identifies rheumatoid arthritis affecting the left shoulder when rheumatoid factor is not present. Use it for documented inflammatory arthritis limited to, or specifically involving, the left shoulder.
Clinical signs
Typical findings include shoulder pain, stiffness, swelling, and reduced range of motion from inflammatory joint disease. Clinical features vary; refer to documentation.
When to use this code
Use this code when the provider documents rheumatoid arthritis without rheumatoid factor in the left shoulder. It is appropriate when the record clearly identifies the left shoulder as the affected site and does not describe rheumatoid factor positivity.
If the note only says rheumatoid arthritis, or the laterality is unclear, check documentation before coding. Code the specific site only when the chart supports that detail.
Do not use for
Do not use this code for rheumatoid arthritis with rheumatoid factor, unspecified shoulder involvement, or nonrheumatoid shoulder pain. Check documentation if the diagnosis is not explicit.
Coding tip
Verify both laterality and serostatus in the provider note before assigning M06.012.