M89.79
Major osseous defect, multiple sites
Billable 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 9
Alongside this code 9 same parent — M89.7
M89.70 Major osseous defect, unspecified site M89.71 Major osseous defect, shoulder region category M89.72 Major osseous defect, humerus category M89.73 Major osseous defect, forearm category M89.74 Major osseous defect, hand category M89.75 Major osseous defect, pelvic region and thigh category M89.76 Major osseous defect, lower leg category M89.77 Major osseous defect, ankle and foot category M89.78 Major osseous defect, other site
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.