ICD-10 Code M05.65 – Rheumatoid arthritis of hip with involvement of other organs and systems (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.65 – Rheumatoid arthritis of hip with involvement of other organs and systems
What it is
This code identifies rheumatoid arthritis affecting the hip, with documented involvement of other organs or systems. Use it when the record supports both hip joint disease and systemic manifestations linked to seropositive rheumatoid arthritis.
Clinical signs
Typical findings include inflammatory hip pain, stiffness, reduced range of motion, and functional limitation. Clinical features vary; refer to documentation for evidence of extra-articular or systemic involvement.
When to use this code
Use this code when the provider documents rheumatoid arthritis of the hip and specifies involvement of other organs or systems. It is appropriate when the hip is the coded joint and the chart supports systemic disease, not isolated joint arthritis. Check documentation if the organ/system involvement is unclear.
Do not use for
Do not use this code for rheumatoid arthritis of the hip without systemic involvement. Also avoid it when the record describes another joint as the primary site or when the diagnosis is uncertain.
Coding tip
Confirm both the hip site and the extra-articular involvement in the provider note before assigning M05.65.