ICD-10 Code S21.452A

Open bite of left back wall of thorax with penetration into thoracic cavity, initial encounter

Version 2020 Billable Code

Valid for Submission

S21.452A is a billable code used to specify a medical diagnosis of open bite of left back wall of thorax with penetration into thoracic cavity, initial encounter. The code is valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:S21.452A
Short Description:Open bite of l bk wl of thorax w penet thoracic cavity, init
Long Description:Open bite of left back wall of thorax with penetration into thoracic cavity, initial encounter

Diagnostic Related Groups

The ICD-10 code S21.452A is grouped in the following groups for version MS-DRG V37.0 What are Diagnostic Related Groups?
The Diagnostic Related Groups (DRGs) are a patient classification scheme which provides a means of relating the type of patients a hospital treats. The DRGs divides all possible principal diagnoses into mutually exclusive principal diagnosis areas referred to as Major Diagnostic Categories (MDC).
applicable from 10/01/2020 through 09/30/2020.

  • 913 - TRAUMATIC INJURY WITH MCC
  • 914 - TRAUMATIC INJURY WITHOUT MCC

Convert S21.452A to ICD-9

  • 862.9 - Intrathorac inj NOS-open (Approximate Flag)

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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