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M66.8

Non-billable

Spontaneous rupture of other tendons

M66.8 is the ICD-10-CM code for Spontaneous rupture of other tendons. It is a non-billable category code — use a more specific child code such as M66.80 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M66
Subcodes
10
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

No additional coding notes for this code.

Frequently asked questions

What is ICD-10 code M66.8?
M66.8 is the ICD-10-CM code for "Spontaneous rupture of other tendons". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M66.8 a billable code?
No — M66.8 is a non-billable header code. Use a more specific child code (such as M66.80) for billing.
What are the subcodes of M66.8?
M66.8 has 10 more specific child codes, including M66.80, M66.81, M66.82.

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

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