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M89.77

Non-billable

Major osseous defect, ankle and foot

M89.77 is the ICD-10-CM code for Major osseous defect, ankle and foot. It is a non-billable category code — use a more specific child code such as M89.771 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M89.7
Subcodes
3
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Includes

  • •Major osseous defect of metatarsus, tarsus, toes

Frequently asked questions

What is ICD-10 code M89.77?
M89.77 is the ICD-10-CM code for "Major osseous defect, ankle and foot". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M89.77 a billable code?
No — M89.77 is a non-billable header code. Use a more specific child code (such as M89.771) for billing.
What are the subcodes of M89.77?
M89.77 has 3 more specific child codes, including M89.771, M89.772, M89.779.

Source: CMS ICD-10-CM FY2026. For informational purposes only — not medical advice. See our medical disclaimer.

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