ICD-10 Code M05.069 – Felty’s syndrome, unspecified knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.069 – Felty’s syndrome, unspecified knee
What it is
M05.069 identifies Felty’s syndrome involving an unspecified knee. Use it when documentation states this rheumatoid arthritis–associated syndrome affects the knee, but the side is not specified.
Clinical signs
Felty’s syndrome is classically linked to long-standing rheumatoid arthritis, splenomegaly, and neutropenia. Clinical features vary; refer to documentation for the knee findings and whether the joint involvement is active or historical.
When to use this code
Use this code when the provider documents Felty’s syndrome and specifically notes knee involvement without naming right or left. It is appropriate when the record supports the syndrome and the affected knee remains unspecified. If laterality is documented elsewhere, code to the more specific option.
Do not use for
Do not use this code for rheumatoid arthritis of the knee without Felty’s syndrome, or for knee pain alone. Check documentation if the syndrome is not clearly stated or if the knee side is identified.
Coding tip
Confirm both the syndrome diagnosis and the unspecified knee laterality before assigning M05.069.