M05.0
Felty's syndrome
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 13 never code together
M05code
M00-M99chapter
Excludes2
- arthropathic psoriasis (L40.5-)L40.5-
- certain conditions originating in the perinatal period (P04-P96)P04-P96
- certain infectious and parasitic diseases (A00-B99)A00-B99
- compartment syndrome (traumatic) (T79.A-)T79.A-
- complications of pregnancy, childbirth and the puerperium (O00-O9A)O00-O9A
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)Q00-Q99
- endocrine, nutritional and metabolic diseases (E00-E88)E00-E88
- injury, poisoning and certain other consequences of external causes (S00-T88)S00-T88
- neoplasms (C00-D49)C00-D49
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)R00-R94
Excludes1 — never code together. The excluded condition and this one are mutually exclusive.
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 3
M05.0code
Inclusion terms
- Rheumatoid arthritis with splenoadenomegaly and leukopenia
M00-M25block
Includes
- Disorders affecting predominantly peripheral (limb) joints
M00-M99chapter
Notes
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Index entries leading here filed at null
No alphabetic index entry points at this code.
Alongside this code 10 same parent — M05
M05.1 Rheumatoid lung disease with rheumatoid arthritis category M05.2 Rheumatoid vasculitis with rheumatoid arthritis category M05.3 Rheumatoid heart disease with rheumatoid arthritis category M05.4 Rheumatoid myopathy with rheumatoid arthritis category M05.5 Rheumatoid polyneuropathy with rheumatoid arthritis category M05.6 Rheumatoid arthritis w involvement of oth organs and systems category M05.7 Rheumatoid arthritis w rheumatoid factor w/o org/sys involv category M05.8 Other rheumatoid arthritis with rheumatoid factor category M05.9 Rheumatoid arthritis with rheumatoid factor, unspecified M05.A Abn rheu fctr & anti-citrul protein antibody w rheu arthrit
Subordinate codes 9
M05.00 Felty's syndrome, unspecified site M05.01 Felty's syndrome, shoulder M05.02 Felty's syndrome, elbow M05.03 Felty's syndrome, wrist M05.04 Felty's syndrome, hand M05.05 Felty's syndrome, hip M05.06 Felty's syndrome, knee M05.07 Felty's syndrome, ankle and foot M05.09 Felty's syndrome, multiple sites
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.