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M20

Non-billable

Acquired deformities of fingers and toes

M20 is the ICD-10-CM code for Acquired deformities of fingers and toes. It is a non-billable category code — use a more specific child code such as M20.0 for billing.

Status
Header (non-billable)
Chapter
M00-M99
Subcodes
7
Edition
FY2026

M00-M99 Diseases of the musculoskeletal system and connective tissue

What this means — in plain language

MedlinePlus · NIH

You use your fingers and thumbs to do everything from grasping objects to playing musical instruments to typing. When there is something wrong with them, it can make life difficult. Common problems include: Injuries that result in fractures (broken bones), ruptured ligaments and dislocations Osteoarthritis - wear-and-tear arthritis. It can also cause deformity. Tendinitis - irritation of the tendons Dupuytren's…

Read more about Finger Injuries and Disorders at MedlinePlus ↗

Source: U.S. National Library of Medicine (MedlinePlus). Informational only — not medical advice.

Excludes1 — not coded here

  • •acquired absence of fingers and toes (Z89.-)
  • •congenital absence of fingers and toes (Q71.3-, Q72.3-)
  • •congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-)

Frequently asked questions

What is ICD-10 code M20?
M20 is the ICD-10-CM code for "Acquired deformities of fingers and toes". It falls under M00-M99 Diseases of the musculoskeletal system and connective tissue.
Is M20 a billable code?
No — M20 is a non-billable header code. Use a more specific child code (such as M20.0) for billing.
What are the subcodes of M20?
M20 has 7 more specific child codes, including M20.0, M20.1, M20.2.
What is excluded from M20?
Excludes1 (not coded here): acquired absence of fingers and toes (Z89.-); congenital absence of fingers and toes (Q71.3-, Q72.3-); congenital deformities and malformations of fingers and toes (Q66.-, Q68-Q70, Q74.-).

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

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