M05.06
Felty's syndrome, knee
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
Alongside this code 8 same parent — M05.0
M05.00 Felty's syndrome, unspecified site M05.01 Felty's syndrome, shoulder category M05.02 Felty's syndrome, elbow category M05.03 Felty's syndrome, wrist category M05.04 Felty's syndrome, hand category M05.05 Felty's syndrome, hip category M05.07 Felty's syndrome, ankle and foot category M05.09 Felty's syndrome, multiple sites
Subordinate codes 3
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.