ICD-10-CM Code S21.9

Open wound of unspecified part of thorax

  1. ICD-10-CM Index
  2. Chapter: S00–T98
  3. Section: S20-S29
  4. Block: S21
  5. S21.9 - Open wound of unspecified part of thorax
Version 2020 Non-Billable Code

Not Valid for Submission

S21.9 is a "header" nonspecific and non-billable code code, consider using a code with a higher level of specificity for a diagnosis of open wound of unspecified part of thorax. The code is NOT valid for the year 2020 for the submission of HIPAA-covered transactions.

ICD-10:S21.9
Short Description:Open wound of unspecified part of thorax
Long Description:Open wound of unspecified part of thorax

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

  • S21.90 - Unspecified open wound of unspecified part of thorax
  • S21.90XA - Unspecified open wound of unspecified part of thorax, initial encounter
  • S21.90XD - Unspecified open wound of unspecified part of thorax, subsequent encounter
  • S21.90XS - Unspecified open wound of unspecified part of thorax, sequela
  • S21.91 - Laceration without foreign body of unspecified part of thorax
  • S21.91XA - Laceration without foreign body of unspecified part of thorax, initial encounter
  • S21.91XD - Laceration without foreign body of unspecified part of thorax, subsequent encounter
  • S21.91XS - Laceration without foreign body of unspecified part of thorax, sequela
  • S21.92 - Laceration with foreign body of unspecified part of thorax
  • S21.92XA - Laceration with foreign body of unspecified part of thorax, initial encounter
  • S21.92XD - Laceration with foreign body of unspecified part of thorax, subsequent encounter
  • S21.92XS - Laceration with foreign body of unspecified part of thorax, sequela
  • S21.93 - Puncture wound without foreign body of unspecified part of thorax
  • S21.93XA - Puncture wound without foreign body of unspecified part of thorax, initial encounter
  • S21.93XD - Puncture wound without foreign body of unspecified part of thorax, subsequent encounter
  • S21.93XS - Puncture wound without foreign body of unspecified part of thorax, sequela
  • S21.94 - Puncture wound with foreign body of unspecified part of thorax
  • S21.94XA - Puncture wound with foreign body of unspecified part of thorax, initial encounter
  • S21.94XD - Puncture wound with foreign body of unspecified part of thorax, subsequent encounter
  • S21.94XS - Puncture wound with foreign body of unspecified part of thorax, sequela
  • S21.95 - Open bite of unspecified part of thorax
  • S21.95XA - Open bite of unspecified part of thorax, initial encounter
  • S21.95XD - Open bite of unspecified part of thorax, subsequent encounter
  • S21.95XS - Open bite of unspecified part of thorax, sequela

Tabular List of Diseases and Injuries

The Tabular List of Diseases and Injuries is a list of ICD-10 codes, organized "head to toe" into chapters and sections with guidance for inclusions, exclusions, descriptions and more. The following references are applicable to the code S21.9:

Inclusion Terms

Inclusion Terms
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
  • Open wound of thoracic wall NOS

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


Chest Injuries and Disorders

The chest is the part of the body between your neck and your abdomen. It includes the ribs and breastbone. Inside your chest are several organs, including the heart, lungs, and esophagus. The pleura, a large thin sheet of tissue, lines the inside of the chest cavity.

Chest injuries and disorders include

  • Heart diseases
  • Lung diseases and collapsed lung
  • Pleural disorders
  • Esophagus disorders
  • Broken ribs
  • Thoracic aortic aneurysms
  • Disorders of the mediastinum, the space between the lungs, breastbone, and spine

[Learn More]

Wounds and 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

  • Animal bites
  • Bruises
  • Burns
  • Dislocations
  • Electrical injuries
  • Fractures
  • Sprains and strains

[Learn More]

Previous Code: S21.459S

Related Codes

Next Code: S21.90