M12.2
Villonodular synovitis (pigmented)
Not billable — category only FY2026 2025-10-01 → 2026-09-30
Exclusions 12 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
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 2
Alongside this code 7 same parent — M12
M12.0 Chronic postrheumatic arthropathy [Jaccoud] category M12.1 Kaschin-Beck disease category M12.3 Palindromic rheumatism category M12.4 Intermittent hydrarthrosis category M12.5 Traumatic arthropathy category M12.8 Other specific arthropathies, not elsewhere classified category M12.9 Arthropathy, unspecified
Subordinate codes 10
M12.20 Villonodular synovitis (pigmented), unspecified site M12.21 Villonodular synovitis (pigmented), shoulder M12.22 Villonodular synovitis (pigmented), elbow M12.23 Villonodular synovitis (pigmented), wrist M12.24 Villonodular synovitis (pigmented), hand M12.25 Villonodular synovitis (pigmented), hip M12.26 Villonodular synovitis (pigmented), knee M12.27 Villonodular synovitis (pigmented), ankle and foot M12.28 Villonodular synovitis (pigmented), other specified site M12.29 Villonodular synovitis (pigmented), 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.