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  6. 2024 ICD-10-CM Code M21.8
Version 2024
Non-Billable Code

2024 ICD-10-CM Diagnosis Code M21.8

Other specified acquired deformities of limbs

ICD-10-CM Code:
M21.8
ICD-10 Code for:
Other specified acquired deformities of limbs
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)
      • Other acquired deformities of limbs
        (M21)

M21.8 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of other specified acquired deformities of limbs. 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 Other specified acquired deformities of limbs

Non-specific codes like M21.8 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 other specified acquired deformities of limbs:

  • Use M21.80 for Other specified acquired deformities of unspecified limb - BILLABLE CODE

  • M21.82 for Other specified acquired deformities of upper arm - NON-BILLABLE CODE

  • Use M21.821 for Other specified acquired deformities of right upper arm - BILLABLE CODE

  • Use M21.822 for Other specified acquired deformities of left upper arm - BILLABLE CODE

  • Use M21.829 for Other specified acquired deformities of unspecified upper arm - BILLABLE CODE

  • M21.83 for Other specified acquired deformities of forearm - NON-BILLABLE CODE

  • Use M21.831 for Other specified acquired deformities of right forearm - BILLABLE CODE

  • Use M21.832 for Other specified acquired deformities of left forearm - BILLABLE CODE

  • Use M21.839 for Other specified acquired deformities of unspecified forearm - BILLABLE CODE

  • M21.85 for Other specified acquired deformities of thigh - NON-BILLABLE CODE

  • Use M21.851 for Other specified acquired deformities of right thigh - BILLABLE CODE

  • Use M21.852 for Other specified acquired deformities of left thigh - BILLABLE CODE

  • Use M21.859 for Other specified acquired deformities of unspecified thigh - BILLABLE CODE

  • M21.86 for Other specified acquired deformities of lower leg - NON-BILLABLE CODE

  • Use M21.861 for Other specified acquired deformities of right lower leg - BILLABLE CODE

  • Use M21.862 for Other specified acquired deformities of left lower leg - BILLABLE CODE

  • Use M21.869 for Other specified acquired deformities of unspecified lower leg - 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 2 Excludes

Type 2 Excludes
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

Patient Education


Arm Injuries and Disorders

Of the 206 bones in your body, three of them are in your arm: the humerus, radius, and ulna. Your arms are also made up of muscles, joints, tendons, and other connective tissue. Injuries to any of these parts of the arm can occur during sports, a fall, or an accident.

Types of arm injuries include :

  • Tendinitis and bursitis
  • Sprains
  • Dislocations
  • Fractures (broken bones)
  • Nerve problems
  • Osteoarthritis

You may also have problems or injure specific parts of your arm, such as your hand, wrist, elbow, or shoulder.


[Learn More in MedlinePlus]

Leg Injuries and Disorders

Your legs are made up of bones, blood vessels, muscles, and other connective tissue. They are important for motion and standing. Playing sports, running, falling, or having an accident can damage your legs. Common leg injuries include sprains and strains, joint dislocations, and fractures (broken bones).

These injuries can affect the entire leg, or just the foot, ankle, knee, or hip. Certain diseases also lead to leg problems. For example, knee osteoarthritis, common in older people, can cause pain and limited motion. Problems in your veins in your legs can lead to varicose veins or deep vein thrombosis.


[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.