M99.86
Other biomechanical lesions of lower extremity
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 2
Index entries leading here 1
Alongside this code 9 same parent — M99.8
M99.80 Other biomechanical lesions of head region M99.81 Other biomechanical lesions of cervical region M99.82 Other biomechanical lesions of thoracic region M99.83 Other biomechanical lesions of lumbar region M99.84 Other biomechanical lesions of sacral region M99.85 Other biomechanical lesions of pelvic region M99.87 Other biomechanical lesions of upper extremity M99.88 Other biomechanical lesions of rib cage M99.89 Other biomechanical lesions of abdomen and other regions
Additional references
AHA Coding Clinic® Licence required
Official coding advice for this code. Published by the American Hospital Association. Not included in this installation.