M89.779
✓ Billable
Major osseous defect, unspecified ankle and foot
ICD-10-CM · FY2026 · Diseases of the Musculoskeletal System and Connective Tissue
Code
M89.779
System
ICD-10-CM
Billable
Yes — valid for submission
Effective
FY2026
Chapter
Diseases of the Musculoskeletal System and Connective Tissue
Source
CMS / CDC NCHS
⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.
Frequently asked questions
What is ICD-10 code M89.779?
ICD-10-CM code M89.779 represents Major osseous defect, unspecified ankle and foot. It is a billable diagnosis code in the Diseases of the Musculoskeletal System and Connective Tissue chapter, effective October 1, 2025 – September 30, 2026.
Is M89.779 billable?
Yes. M89.779 is a valid billable ICD-10-CM code for insurance claims and clinical documentation.
What chapter is M89.779 in?
M89.779 belongs to the Diseases of the Musculoskeletal System and Connective Tissue chapter (M00–M99) of ICD-10-CM.
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M89
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