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M21.16

Non-billable

Varus deformity, not elsewhere classified, knee

M21.16 is the ICD-10-CM code for Varus deformity, not elsewhere classified, knee. It is a non-billable category code — use a more specific child code such as M21.161 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Parent
M21.1
Subcodes
3
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

Includes

  • •Bow leg
  • •Genu varum

Frequently asked questions

What is ICD-10 code M21.16?
M21.16 is the ICD-10-CM code for "Varus deformity, not elsewhere classified, knee". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M21.16 a billable code?
No — M21.16 is a non-billable header code. Use a more specific child code (such as M21.161) for billing.
What are the subcodes of M21.16?
M21.16 has 3 more specific child codes, including M21.161, M21.162, M21.169.

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

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