ICD-10 Code M05.029 – Felty’s syndrome, unspecified elbow (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.029 – Felty’s syndrome, unspecified elbow
What it is
M05.029 identifies Felty’s syndrome affecting the unspecified elbow. It is used when rheumatoid arthritis with Felty’s syndrome is documented and the elbow site is named, but laterality is not specified.
Clinical signs
Felty’s syndrome is classically associated with long-standing rheumatoid arthritis, splenomegaly, and neutropenia. Clinical features vary; refer to documentation for the elbow involvement and any recorded joint findings.
When to use this code
Use this code when the provider documents Felty’s syndrome and specifies the elbow, but does not state whether the right or left elbow is involved. It also fits when the chart confirms the condition and the elbow is the documented site. Check documentation if the elbow finding is unclear or if another joint is named instead.
Do not use for
Do not use this code for rheumatoid arthritis without Felty’s syndrome, or for elbow pain alone. If laterality is documented, choose the appropriate side-specific code instead.
Coding tip
Verify both the Felty’s syndrome diagnosis and the elbow site in the provider note before assigning M05.029.