M89 › M89.7 › M89.77

M89.772 Major osseous defect, left ankle and foot

BillableNo payment HCCChapter 13

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Instructional notes

Chapter 13

Excludes2Not included here: the patient may have both; report both when both are present.

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)

Notes

Use an external cause code following the code for the musculoskeletal condition, if applicable, to identify the cause of the musculoskeletal condition

M89.7

Code firstSequence the underlying condition first.

underlying disease, if known, such as:
aseptic necrosis of bone (M87.-)
malignant neoplasm of bone (C40.-)
osteolysis (M89.5-)
osteomyelitis (M86.-)
osteonecrosis (M87.-)
osteoporosis (M80.-, M81.-)
periprosthetic osteolysis (T84.05-)

M89.77

Inclusion terms

Major osseous defect of metatarsus, tarsus, toes

Chapter 13: Diseases of the musculoskeletal system and connective tissue · M80-M94 Osteopathies and chondropathies (M80-M94)

Source: ICD-10-CM FY 2027 code descriptions and tabular list (CMS and CDC National Center for Health Statistics), effective 2026-10-01 through 2027-09-30 · CMS ICD-10 files. HCC mapping: CMS-HCC V28, payment year 2027. As of 2026-11-04.

Coverage and payment depend on the claim details; confirm with the Medicare Administrative Contractor.