M89.77
Major osseous defect, ankle and foot
M89.77 is a non-billable ICD-10-CM code header for major osseous defect, ankle and foot. Report a more specific code from it instead. It is part of the FY2027 code set, effective October 1, 2026. The more specific codes under it are M89.771 Major osseous defect, right ankle and foot; M89.772 Major osseous defect, left ankle and foot and M89.779 Major osseous defect, unspecified ankle and foot. Its coding notes include a Code first instruction, 1 Excludes1 entry and 10 Excludes2 entries.
Code first
If the underlying condition listed here is present and known, sequence it first.
Excludes1
Not coded here. The listed conditions generally should not be reported together.
Excludes2
Not included here. Both codes may be reported if the patient has both conditions.
Also from chapter/block level (10 notes)
- arthropathic psoriasis (L40.5-)
- certain conditions originating in the perinatal period (P04-P96)
- certain infectious and parasitic diseases (A00-B99)
- compartment syndrome (traumatic) (T79.A-)
- complications of pregnancy, childbirth and the puerperium (O00-O9A)
- congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
- endocrine, nutritional and metabolic diseases (E00-E88)
- injury, poisoning and certain other consequences of external causes (S00-T88)
- neoplasms (C00-D49)
- symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Inclusion terms
Conditions classified to this code.
- Major osseous defect of metatarsus, tarsus, toes
Notes
Also from chapter/block level (1 note)
- Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition
Alphabetic Index terms
Terms the official Alphabetic Index lists for this code. 10 entries
- Defect, defective, major osseous, ankle
- Defect, defective, major osseous, foot
- Defect, defective, major osseous, metatarsus
- Defect, defective, major osseous, tarsus
- Defect, defective, major osseous, toes
- Defect, defective, osseous, major, ankle
- Defect, defective, osseous, major, foot
- Defect, defective, osseous, major, metatarsus
- Defect, defective, osseous, major, tarsus
- Defect, defective, osseous, major, toes