ICD-10 Code M05.01 – Felty’s syndrome, shoulder (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code M05.01 – Felty’s syndrome, shoulder
What it is
M05.01 identifies Felty’s syndrome affecting the shoulder. Use it when documentation links the shoulder diagnosis to this rheumatoid arthritis-related syndrome.
Clinical signs
Clinical features vary; refer to documentation. Felty’s syndrome is typically associated with rheumatoid arthritis and may include splenomegaly and neutropenia, but you should code only what is documented.
When to use this code
Use this code when the provider specifically documents Felty’s syndrome involving the shoulder. It may also apply when the record clearly states shoulder involvement as part of the syndrome. Check documentation if the site or laterality is unclear.
Do not use for
Do not use it for uncomplicated rheumatoid arthritis of the shoulder or for shoulder pain without Felty’s syndrome. If the chart does not clearly connect the shoulder to Felty’s syndrome, code the documented condition instead.
Coding tip
Verify that the record names Felty’s syndrome and the shoulder together before assigning M05.01.