ICD-10 Code M05.039 – Felty’s syndrome, unspecified wrist (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.039 – Felty’s syndrome, unspecified wrist
What it is
M05.039 identifies Felty’s syndrome affecting the wrist when the laterality or specific wrist is not documented. It is a rheumatoid arthritis-related condition; use the code only when the chart supports Felty’s syndrome.
Clinical signs
Clinical features may include long-standing rheumatoid arthritis, splenomegaly, and neutropenia. Documentation may also note recurrent infections or joint involvement; if details are limited, check documentation.
When to use this code
Use this code when the provider documents Felty’s syndrome and the affected site is the wrist, but the record does not specify which wrist. It may also apply when the wrist is involved as part of the documented syndrome. If the note only says rheumatoid arthritis or splenomegaly alone, this code is not supported.
Do not use for
Do not use it for rheumatoid arthritis without Felty’s syndrome, or for unspecified wrist pain without a documented syndrome. If the laterality or diagnosis is unclear, check documentation.
Coding tip
Confirm both the syndrome and the wrist site in the provider note before assigning M05.039.