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  6. 2024 ICD-10-CM Code M20.0
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code M20.0

Deformity of finger(s)

ICD-10-CM Code:
M20.0
ICD-10 Code for:
Deformity of finger(s)
Is Billable?
Not Valid for Submission
Code Navigator:

Code Classification

  • Diseases of the musculoskeletal system and connective tissue
    (M00–M99)
    • Other joint disorders
      (M20-M25)
      • Acquired deformities of fingers and toes
        (M20)

M20.0 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of deformity of finger(s). The code is not specific and is NOT valid for the year 2024 for the submission of HIPAA-covered transactions. Category or Header define the heading of a category of codes that may be further subdivided by the use of 4th, 5th, 6th or 7th characters.

Specific Coding Applicable to Deformity of finger(s)

Non-specific codes like M20.0 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10-CM codes with a higher level of specificity when coding for deformity of finger(s):

  • M20.00 for Unspecified deformity of finger(s) - NON-BILLABLE CODE

  • Use M20.001 for Unspecified deformity of right finger(s) - BILLABLE CODE

  • Use M20.002 for Unspecified deformity of left finger(s) - BILLABLE CODE

  • Use M20.009 for Unspecified deformity of unspecified finger(s) - BILLABLE CODE

  • M20.01 for Mallet finger - NON-BILLABLE CODE

  • Use M20.011 for Mallet finger of right finger(s) - BILLABLE CODE

  • Use M20.012 for Mallet finger of left finger(s) - BILLABLE CODE

  • Use M20.019 for Mallet finger of unspecified finger(s) - BILLABLE CODE

  • M20.02 for Boutonniere deformity - NON-BILLABLE CODE

  • Use M20.021 for Boutonniere deformity of right finger(s) - BILLABLE CODE

  • Use M20.022 for Boutonniere deformity of left finger(s) - BILLABLE CODE

  • Use M20.029 for Boutonniere deformity of unspecified finger(s) - BILLABLE CODE

  • M20.03 for Swan-neck deformity - NON-BILLABLE CODE

  • Use M20.031 for Swan-neck deformity of right finger(s) - BILLABLE CODE

  • Use M20.032 for Swan-neck deformity of left finger(s) - BILLABLE CODE

  • Use M20.039 for Swan-neck deformity of unspecified finger(s) - BILLABLE CODE

  • M20.09 for Other deformity of finger(s) - NON-BILLABLE CODE

  • Use M20.091 for Other deformity of right finger(s) - BILLABLE CODE

  • Use M20.092 for Other deformity of left finger(s) - BILLABLE CODE

  • Use M20.099 for Other deformity of finger(s), unspecified finger(s) - BILLABLE CODE

Tabular List of Diseases and Injuries

The following annotation back-references are applicable to this diagnosis code. The Tabular List of Diseases and Injuries is a list of ICD-10-CM codes, organized "head to toe" into chapters and sections with coding notes and guidance for inclusions, exclusions, descriptions and more.


Type 1 Excludes

Type 1 Excludes
A type 1 excludes note is a pure excludes note. It means "NOT CODED HERE!" An Excludes1 note indicates that the code excluded should never be used at the same time as the code above the Excludes1 note. An Excludes1 is used when two conditions cannot occur together, such as a congenital form versus an acquired form of the same condition.
  • clubbing of fingers R68.3
  • palmar fascial fibromatosis Dupuytren M72.0
  • trigger finger M65.3

Patient Education


Finger Injuries and Disorders

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 contracture - a hereditary thickening of the tough tissue that lies just below the skin of your palm. It causes the fingers to stiffen and bend.
  • Trigger finger - an irritation of the sheath that surrounds the flexor tendons. It can cause the tendon to catch and release like a trigger.

[Learn More in MedlinePlus]

Code History

  • FY 2024 - No Change, effective from 10/1/2023 through 9/30/2024
  • FY 2023 - No Change, effective from 10/1/2022 through 9/30/2023
  • FY 2022 - No Change, effective from 10/1/2021 through 9/30/2022
  • FY 2021 - No Change, effective from 10/1/2020 through 9/30/2021
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016. This was the first year ICD-10-CM was implemented into the HIPAA code set.