ICD-10 Code M05.062 – Felty’s syndrome, left knee (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.062 – Felty’s syndrome, left knee
What it is
This code identifies Felty’s syndrome affecting the left knee. It is used when rheumatoid arthritis-related disease is documented with involvement of that specific joint.
Clinical signs
Clinical features vary; refer to documentation. Findings may include inflammatory joint pain, swelling, stiffness, and signs of rheumatoid disease affecting the left knee.
When to use this code
Use this code when the provider documents Felty’s syndrome with left knee involvement, or when the left knee is clearly identified as the site of the condition. Confirm laterality in the record before assigning it. If documentation only states Felty’s syndrome without a knee site, check documentation.
Do not use for
Do not use this code for unspecified knee involvement or for rheumatoid arthritis without documented Felty’s syndrome. Do not guess laterality when the record is incomplete.
Coding tip
Match the diagnosis wording exactly to the documented site and laterality before coding.