2021 ICD-10-CM Code S21.209

Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity

Version 2021

Not Valid for Submission

S21.209 is a non-specific and non-billable diagnosis code code, consider using a code with a higher level of specificity for a diagnosis of unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity. The code is not specific and is NOT valid for the year 2021 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.

The ICD-10-CM code S21.209 might also be used to specify conditions or terms like degloving injury back, degloving injury, scapular area, dislocation of costovertebral joint, dislocation of scapulothoracic joint, fracture of first thoracic vertebra , fracture of fourth thoracic vertebra, etc.

Unspecified diagnosis codes like S21.209 are acceptable when clinical information is unknown or not available about a particular condition. Although a more specific code is preferable, unspecified codes should be used when such codes most accurately reflect what is known about a patient's condition. Specific diagnosis codes should not be used if not supported by the patient's medical record.

ICD-10:S21.209
Short Description:Unsp opn wnd unsp bk wl of thorax w/o penet thoracic cavity
Long Description:Unspecified open wound of unspecified back wall of thorax without penetration into thoracic cavity

Code Classification

Coding Guidelines

The appropriate 7th character is to be added to each code from block Open wound of thorax (S21). Use the following options for the aplicable episode of care:

Specific Coding for Unsp opn wnd unsp bk wl of thorax w/o penet thoracic cavity

Non-specific codes like S21.209 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 unsp opn wnd unsp bk wl of thorax w/o penet thoracic cavity:

  • BILLABLE CODE - Use S21.209A for initial encounter
  • BILLABLE CODE - Use S21.209D for subsequent encounter
  • BILLABLE CODE - Use S21.209S for sequela

Approximate Synonyms

The following clinical terms are approximate synonyms or lay terms that might be used to identify the correct diagnosis code:

Information for Patients


Back Injuries

Your back is made of bones, muscles, and other tissues extending from your neck to your pelvis. Back injuries can result from sports injuries, work around the house or in the garden, or a sudden jolt such as a car accident. The lower back is the most common site of back injuries and back pain. Common back injuries include

These injuries can cause pain and limit your movement. Treatments vary but might include medicines, icing, bed rest, physical therapy, or surgery. You might be able to prevent some back injuries by maintaining a healthy weight, lifting objects with your legs, and using lower-back support when you sit.


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Wounds and Injuries

Also called: Traumatic injuries

An injury is damage to your body. It is a general term that refers to harm caused by accidents, falls, hits, weapons, and more. In the U.S., millions of people injure themselves every year. These injuries range from minor to life-threatening. Injuries can happen at work or play, indoors or outdoors, driving a car, or walking across the street.

Wounds are injuries that break the skin or other body tissues. They include cuts, scrapes, scratches, and punctured skin. They often happen because of an accident, but surgery, sutures, and stitches also cause wounds. Minor wounds usually aren't serious, but it is important to clean them. Serious and infected wounds may require first aid followed by a visit to your doctor. You should also seek attention if the wound is deep, you cannot close it yourself, you cannot stop the bleeding or get the dirt out, or it does not heal.

Other common types of injuries include


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Code History

  • 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 (First year ICD-10-CM implemented into the HIPAA code set)