ICD-10 Code M06.059 – Rheumatoid arthritis without rheumatoid factor, unspecified hip (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M06.059 – Rheumatoid arthritis without rheumatoid factor, unspecified hip
What it is
This code identifies rheumatoid arthritis affecting the hip when rheumatoid factor is not present or not documented. Use it for inflammatory arthritis in the unspecified hip, with no more specific hip laterality recorded.
Clinical signs
Typical findings include hip pain, stiffness, reduced range of motion, and inflammatory joint symptoms. Clinical features vary; refer to documentation.
When to use this code
Use M06.059 when the provider documents rheumatoid arthritis without rheumatoid factor and identifies the hip, but does not specify right or left. It also fits when the record supports RA of the hip and laterality is unavailable. Check documentation if the note is unclear about serology or the affected side.
Do not use for
Do not use this code for rheumatoid arthritis with a documented rheumatoid factor, or when the hip side is specified and a more precise code is available. Do not assign it if the diagnosis is another inflammatory or degenerative hip disorder.
Coding tip
Confirm both the serologic description and hip laterality in the note before coding.