M12.28
Villonodular synovitis (pigmented), other specified site
Billable 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 3
M12.28code
Inclusion terms
- Villonodular synovitis (pigmented), vertebrae
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 1
Alongside this code 9 same parent — M12.2
M12.20 Villonodular synovitis (pigmented), unspecified site M12.21 Villonodular synovitis (pigmented), shoulder category M12.22 Villonodular synovitis (pigmented), elbow category M12.23 Villonodular synovitis (pigmented), wrist category M12.24 Villonodular synovitis (pigmented), hand category M12.25 Villonodular synovitis (pigmented), hip category M12.26 Villonodular synovitis (pigmented), knee category M12.27 Villonodular synovitis (pigmented), ankle and foot category 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.