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M21.7

Non-billable

Unequal limb length (acquired)

M21.7 is the ICD-10-CM code for Unequal limb length (acquired). It is a non-billable category code — use a more specific child code such as M21.70 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M21
Subcodes
5
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Notes

  • •The site used should correspond to the shorter limb

Frequently asked questions

What is ICD-10 code M21.7?
M21.7 is the ICD-10-CM code for "Unequal limb length (acquired)". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M21.7 a billable code?
No — M21.7 is a non-billable header code. Use a more specific child code (such as M21.70) for billing.
What are the subcodes of M21.7?
M21.7 has 5 more specific child codes, including M21.70, M21.72, M21.73.

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

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