Loading...

    Explore
    • Policy Monitoring
    • Live Policy Feed
    • Billing Codes
    • NPI Medicare & Medicaid
    • Healthcare Providers
    • Health Insurance Payers
    • States
    • Service Lines
    • Taxonomy Codes
    Lookup tools
    • Billing Code Lookup
    • CPT Modifier Lookup
    • Provider Taxonomy Code Lookup
    • Healthcare Provider & Facility Lookup
    • Health Insurance Payer Lookup
    • Payer Contact Directory

    Policy & Benchmark Tools

    • Prior Authorization Lookup
    • Coverage Criteria Lookup
    • Timely Filing Lookup
    • Billing Code Reimbursement Rates
    • Payer Comparison Dashboard
    • Facility Comparison Dashboard
    • All tools

    Company

    • About OpenPayer
    • Data Sources
    • Trek Health
    OpenPayerby Trek Health
    LinkedInYouTube

    © 2026 Trek Health. All rights reserved.

    OpenPayer is built and maintained by Trek Health.

    v1.0.28
    OpenPayerBilling CodesInjuries to the thoraxICD-10-CM s21-open-wound-of-thorax
    Ask Trek AI about this page

    ICD-10-CM Code For Open Wound Of Thorax: Group Overview

    The International Classification of Diseases, Tenth Revision, Clinical Modification (ICD-10-CM) code group S21 includes open wounds of the thorax such as penetrating chest wall injuries, open wounds of the breast, and wounds that may involve underlying thoracic organs. These ICD-10-CM diagnosis codes are used to document traumatic chest injuries, capturing wound location, depth, and any involvement of internal thoracic structures relevant to clinical care. Accurate coding within the ICD-10-CM S21 group supports proper claim adjudication, complete clinical documentation, and appropriate reimbursement.

    Customize your policy alerts

    Sign up for ICD-10-CM Code For Open Wound Of Thorax: Group Overview policy alerts

    Get alerted when relevant policies change without checking for updates manually.

    Monitor payer policy activity

    Receive email alerts as soon as relevant payer policies are published or updated.

    ICD-10-CM S21: Open Wound Of Thorax Overview

    The ICD-10-CM S21 group represents open wounds that affect the thorax, including penetrating injuries to the chest wall, breast, and other structures of the thoracic region. These diagnoses target traumatic breaches of skin and underlying tissues of the chest and may involve ribs, lungs, heart, or major vessels. Accurate coding matters for proper clinical documentation and reimbursement because it reflects wound severity, associated organ involvement, and resource utilization.

    Table of contents

    Progress1 / 5

    Explore openpayer tools

    • Billing CodesCPT, HCPCS, DRG & more
    • Reimbursement RatesCommercial vs. Medicare rate reports
    • ProvidersHospitals & facilities
    • PayersPlans & market footprint
    • Taxonomy CodesNUCC specialty codes
    • ModifiersCPT modifiers & usage
    • Prior AuthorizationPA policies by payer & drug
    • Timely FilingFiling deadlines by payer
    • Coverage CriteriaMedical necessity by payer
    • Payer ContactsClaims, PA & appeals contacts
    View all tools

    When to Use

    Assign a code from this group when documenting a patient with a traumatic open wound of the thorax identified on clinical examination or imaging. Use specific codes to indicate the exact thoracic site and any associated involvement of internal organs or complications.

    ICD-10-CM Codes

    288 rows

    ICD-10-CM CodeDescription
    S21.001AUnspecified open wound of right breast, initial encounter
    S21.001DUnspecified open wound of right breast, subsequent encounter
    S21.001SUnspecified open wound of right breast, sequela
    S21.002AUnspecified open wound of left breast, initial encounter
    S21.002DUnspecified open wound of left breast, subsequent encounter
    S21.002SUnspecified open wound of left breast, sequela
    S21.009AUnspecified open wound of unspecified breast, initial encounter
    S21.009DUnspecified open wound of unspecified breast, subsequent encounter
    S21.009SUnspecified open wound of unspecified breast, sequela
    S21.011ALaceration without foreign body of right breast, initial encounter
    S21.011DLaceration without foreign body of right breast, subsequent encounter
    S21.011SLaceration without foreign body of right breast, sequela
    S21.012ALaceration without foreign body of left breast, initial encounter
    S21.012DLaceration without foreign body of left breast, subsequent encounter
    S21.012SLaceration without foreign body of left breast, sequela
    S21.019ALaceration without foreign body of unspecified breast, initial encounter
    S21.019DLaceration without foreign body of unspecified breast, subsequent encounter
    S21.019SLaceration without foreign body of unspecified breast, sequela
    S21.021ALaceration with foreign body of right breast, initial encounter
    S21.021DLaceration with foreign body of right breast, subsequent encounter

    Showing 1–20 of 288

    • More pages

    DRG Codes

    9 rows

    DRG CodeDescription
    604Trauma to the Skin, Subcutaneous Tissue and Breast with MCC
    605Trauma to the Skin, Subcutaneous Tissue and Breast without MCC
    913Traumatic Injury with MCC
    914Traumatic Injury without MCC
    949Aftercare with CC/MCC
    950Aftercare without CC/MCC
    963Other Multiple Significant Trauma with MCC
    964Other Multiple Significant Trauma with CC
    965Other Multiple Significant Trauma without CC/MCC

    Related Codes

    S20-SUPERFICIAL-INJURY-OF-THORAX

    ICD-10-CM Code For Superficial Injury Of Thorax: Group Overview

    S22-FRACTURE-OF-RIBS-STERNUM-THORACIC-SPINE

    ICD-10-CM Code For Fracture Of Rib(s), Sternum And Thoracic Spine: Group Overview

    S23-DISLOCATION-AND-SPRAIN-THORAX

    ICD-10-CM Code For Dislocation And Sprain Of Joints And Ligaments Of Thorax: Group Overview

    S24-INJURY-OF-THORACIC-NERVES-AND-SPINAL-CORD

    ICD-10-CM Code For Injury Of Nerves And Spinal Cord At Thorax Level: Group Overview

    S25-INJURY-OF-BLOOD-VESSELS-OF-THORAX

    ICD-10-CM Code For Injury Of Blood Vessels Of Thorax: Group Overview

    S26-INJURY-OF-HEART

    ICD-10-CM Code For Injury Of Heart: Group Overview

    S27-INJURY-OF-INTRATHORACIC-ORGANS

    ICD-10-CM Code For Injury Of Other And Unspecified Intrathoracic Organs: Group Overview

    S28-CRUSHING-INJURY-OF-THORAX

    ICD-10-CM Code For Crushing Injury Of Thorax And Traumatic Amputation Of Part Of Thorax: Group Overview

    S29-OTHER-AND-UNSPECIFIED-INJURIES-OF-THORAX

    ICD-10-CM Code For Other And Unspecified Injuries Of Thorax: Group Overview

    Frequently Asked Questions

    References

    1. 1.CPT® Codes and Descriptions. AAPC. Retrieved Aug 11, 2026.Maintains the CPT code set's official descriptions and guidelines, licensed from the American Medical Association, used as the definitional source for CPT codes on this page.
    2. 2.HCPCS Quarterly Update. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's quarterly release of HCPCS Level II codes and short/long descriptors, the source for HCPCS code definitions and update history.
    3. 3.ICD-10-CM Full Code List. Centers for Medicare & Medicaid Services (CMS). Retrieved Aug 11, 2026.CMS's complete ICD-10-CM diagnosis code list, used to cross-reference diagnosis codes associated with this procedure or service.
    Published by

    Trek Health powers OpenPayer with a leading commercial payer intelligence platform, seamlessly converting fragmented payer data into actionable insights for provider organizations.

    Trek Health ingests and normalizes Transparency in Coverage data and payer policy updates to give provider organizations a clear view of how commercial reimbursement behaves across markets, payers, and services. Our platform transforms raw payer disclosures into structured intelligence that supports contract evaluation, payer negotiations, and service line strategy. By combining market benchmarks with ongoing policy visibility, Trek helps teams identify variability, risk, and opportunity in commercial reimbursement. The result is faster insight, stronger negotiating positions, and more informed financial decisions.