M06.36
Rheumatoid nodule, knee
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 10 never code together
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
Excludes2 — not included here, but the patient may have both. Code both when documented.
Instructional notes 2
Alongside this code 9 same parent — M06.3
M06.30 Rheumatoid nodule, unspecified site M06.31 Rheumatoid nodule, shoulder category M06.32 Rheumatoid nodule, elbow category M06.33 Rheumatoid nodule, wrist category M06.34 Rheumatoid nodule, hand category M06.35 Rheumatoid nodule, hip category M06.37 Rheumatoid nodule, ankle and foot category M06.38 Rheumatoid nodule, vertebrae M06.39 Rheumatoid nodule, 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.