ICD-10 Code M05.852 – Other rheumatoid arthritis with rheumatoid factor of left hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.852 – Other rheumatoid arthritis with rheumatoid factor of left hip
What it is
This code identifies rheumatoid arthritis affecting the left hip when rheumatoid factor is documented. It applies to rheumatoid arthritis that is not otherwise specified by another more exact rheumatoid arthritis code.
Clinical signs
Typical findings include inflammatory joint pain, stiffness, and reduced range of motion in the left hip. Clinical features vary; refer to documentation for confirmation of rheumatoid factor and hip involvement.
When to use this code
Use this code when the provider documents rheumatoid arthritis with rheumatoid factor and specifies the left hip. It is appropriate when the record supports rheumatoid arthritis involving that joint and no more specific subtype is documented. Check documentation if laterality or rheumatoid factor status is unclear.
Do not use for
Do not use it for rheumatoid arthritis without rheumatoid factor, or when the affected hip is not the left side. If the chart only says arthritis or joint pain, this code is not supported.
Coding tip
Verify both rheumatoid factor and left-hip laterality in the provider note before assigning M05.852.