M21.2 - Flexion deformity

Version 2023
ICD-10:M21.2
Short Description:Flexion deformity
Long Description:Flexion deformity
Status: Not Valid for Submission
Version:ICD-10-CM 2023
Code Classification:
  • Diseases of the musculoskeletal system and connective tissue (M00–M99)
    • Other joint disorders (M20-M25)
      • Other acquired deformities of limbs (M21)

M21.2 is a non-specific and non-billable ICD-10 code code, consider using a code with a higher level of specificity for a diagnosis of flexion deformity. The code is not specific and is NOT valid for the year 2023 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 for Flexion deformity

Non-specific codes like M21.2 require more digits to indicate the appropriate level of specificity. Consider using any of the following ICD-10 codes with a higher level of specificity when coding for flexion deformity:

  • BILLABLE CODE - Use M21.20 for Flexion deformity, unspecified site
  • NON-BILLABLE CODE - M21.21 for Flexion deformity, shoulder
  • BILLABLE CODE - Use M21.211 for Flexion deformity, right shoulder
  • BILLABLE CODE - Use M21.212 for Flexion deformity, left shoulder
  • BILLABLE CODE - Use M21.219 for Flexion deformity, unspecified shoulder
  • NON-BILLABLE CODE - M21.22 for Flexion deformity, elbow
  • BILLABLE CODE - Use M21.221 for Flexion deformity, right elbow
  • BILLABLE CODE - Use M21.222 for Flexion deformity, left elbow
  • BILLABLE CODE - Use M21.229 for Flexion deformity, unspecified elbow
  • NON-BILLABLE CODE - M21.23 for Flexion deformity, wrist
  • BILLABLE CODE - Use M21.231 for Flexion deformity, right wrist
  • BILLABLE CODE - Use M21.232 for Flexion deformity, left wrist
  • BILLABLE CODE - Use M21.239 for Flexion deformity, unspecified wrist
  • NON-BILLABLE CODE - M21.24 for Flexion deformity, finger joints
  • BILLABLE CODE - Use M21.241 for Flexion deformity, right finger joints
  • BILLABLE CODE - Use M21.242 for Flexion deformity, left finger joints
  • BILLABLE CODE - Use M21.249 for Flexion deformity, unspecified finger joints
  • NON-BILLABLE CODE - M21.25 for Flexion deformity, hip
  • BILLABLE CODE - Use M21.251 for Flexion deformity, right hip
  • BILLABLE CODE - Use M21.252 for Flexion deformity, left hip
  • BILLABLE CODE - Use M21.259 for Flexion deformity, unspecified hip
  • NON-BILLABLE CODE - M21.26 for Flexion deformity, knee
  • BILLABLE CODE - Use M21.261 for Flexion deformity, right knee
  • BILLABLE CODE - Use M21.262 for Flexion deformity, left knee
  • BILLABLE CODE - Use M21.269 for Flexion deformity, unspecified knee
  • NON-BILLABLE CODE - M21.27 for Flexion deformity, ankle and toes
  • BILLABLE CODE - Use M21.271 for Flexion deformity, right ankle and toes
  • BILLABLE CODE - Use M21.272 for Flexion deformity, left ankle and toes
  • BILLABLE CODE - Use M21.279 for Flexion deformity, unspecified ankle and toes

Patient Education


Joint Disorders

What are joints?

Your joints are places where two or more bones come together. Your shoulders, elbows, hips, knees, and knuckles are all joints. Your spine has joints, too.

But joints are more than bones. They include the soft tissues around them, such as cartilage, tendons and ligaments. Cartilage is the hard slippery flexible tissue that covers the ends of your bones at a joint. Tendons are tough, flexible bands that connect your muscles to your bones so you can move your joints. Ligaments connect the bones of the joint to each other to keep them stable when you move.

What are joint disorders?

Joint disorders are diseases or injuries that affect your joints. Injuries can happen because of overuse of a joint. Or you could have a sudden injury, such as an accident or a sports injury.

What diseases can affect the joints?

Many diseases can affect the joints. They often cause joint pain and make your joints stiff, red, or swollen. Most of them are chronic. That means they last a long time. Some may never go away completely. Some of the diseases that affect the joints include:

Treatments are different depending on the disease. But most treatments include medicines and therapies to relieve pain and other symptoms.

What types of joint disorders happen from sudden injuries?

Joint disorders from sudden injuries include:

Treatment depends on the type of injury. You can treat many sports injuries at home. But you should call your health care provider if you:

What types of joint disorders happen from overuse?

Overuse injuries usually damage the soft tissues of the joint. They can happen when you work a joint too hard by doing the same movements over and over. For example, you could get an overuse injury from playing a musical instrument, playing sports, or doing certain jobs, such as carpentry or painting.

Joint overuse injuries include:

The treatments for bursitis, tendinitis, and chronic strain are often the same. They usually include rest, keeping the injured joint higher than your heart, and taking medicine to reduce swelling. Your provider may recommend gentle exercise and other treatment. In some cases, your provider may suggest an injection (a shot) of medicine into the joint. If these do not help, you may need surgery.

How can I keep my joints healthy?

Getting enough physical activity is one of the most important things you can do to prevent or slow joint disorders. Activity strengthens the muscles around your joints and helps them work better.

When you play sports, wear the right equipment to protect your joints, such as knee pads. If you already have joint problems, ask your provider what type of activities are best for you.

NIH: National Institute of Arthritis and Musculoskeletal and Skin Diseases


[Learn More in MedlinePlus]

Code History