ICD-10 Code M05.049 – Felty’s syndrome, unspecified hand (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.049 – Felty’s syndrome, unspecified hand
What it is
M05.049 identifies Felty’s syndrome affecting the unspecified hand. It is used when rheumatoid arthritis is associated with this syndrome and the hand laterality is not specified.
Clinical signs
Clinical features vary; refer to documentation. Standard references describe Felty’s syndrome as rheumatoid arthritis with splenomegaly and neutropenia, and hand involvement should be documented if coded here.
When to use this code
Use this code when the record documents Felty’s syndrome and the affected hand is not identified as right or left. It may apply in specialty notes, problem lists, or discharge summaries that specifically link the syndrome to an unspecified hand. Check documentation if the laterality is unclear.
Do not use for
Do not use this code for rheumatoid arthritis without Felty’s syndrome, or when the hand laterality is documented as right or left. Check documentation if the diagnosis does not clearly mention hand involvement.
Coding tip
Verify both the syndrome and the unspecified hand designation before assigning M05.049.