ICD-10-CM Code S21.459

Open bite of unspecified back wall of thorax with penetration into thoracic cavity

Version 2020 Non-Billable Code

Not Valid for Submission

S21.459 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of open bite of unspecified back wall of thorax with penetration into thoracic cavity. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:S21.459
Short Description:Open bite of unsp bk wl of thorax w penet thoracic cavity
Long Description:Open bite of unspecified back wall of thorax with penetration into thoracic cavity

Consider the following ICD-10 codes with a higher level of specificity:

  • S21.459A - Open bite of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter
  • S21.459D - Open bite of unspecified back wall of thorax with penetration into thoracic cavity, subsequent encounter
  • S21.459S - Open bite of unspecified back wall of thorax with penetration into thoracic cavity, sequela

Code Classification

  • Injury, poisoning and certain other consequences of external causes (S00–T98)
    • Injuries to the thorax (S20-S29)
      • Open wound of thorax (S21)

Code History

  • FY 2016 - New Code, effective from 10/1/2015 through 9/30/2016
    (First year ICD-10-CM implemented into the HIPAA code set)
  • FY 2017 - No Change, effective from 10/1/2016 through 9/30/2017
  • FY 2018 - No Change, effective from 10/1/2017 through 9/30/2018
  • FY 2019 - No Change, effective from 10/1/2018 through 9/30/2019
  • FY 2020 - No Change, effective from 10/1/2019 through 9/30/2020

Information for Patients


Animal Bites

Wild animals usually avoid people. They might attack, however, if they feel threatened, are sick, or are protecting their young or territory. Attacks by pets are more common. Animal bites rarely are life-threatening, but if they become infected, you can develop serious medical problems.

To prevent animal bites and complications from bites

  • Never pet, handle, or feed unknown animals
  • Leave snakes alone
  • Watch your children closely around animals
  • Vaccinate your cats, ferrets, and dogs against rabies
  • Spay or neuter your dog to make it less aggressive
  • Get a tetanus booster if you have not had one recently
  • Wear boots and long pants when you are in areas with venomous snakes

If an animal bites you, clean the wound with soap and water as soon as possible. Get medical attention if necessary.

Centers for Disease Control and Prevention


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