S21.439A ✓ Billable

Puncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter

Q: What is ICD-10 code S21.439A?

ICD-10-CM code S21.439A stands for "Puncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter". It is a billable code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective FY2026 (Oct 1, 2025 – Sep 30, 2026).

Q: Is S21.439A a billable ICD-10 code?

Yes. S21.439A (Puncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter) is billable and can be used for insurance claims. Always verify payer-specific requirements.

ICD-10-CM · FY2026 · Injury, Poisoning and Certain Other Consequences of External Causes

Code

S21.439A

System

ICD-10-CM

Billable

Yes — valid for submission

Effective

FY2026

Chapter

Injury, Poisoning and Certain Other Consequences of External Causes

Source

CMS / CDC NCHS

⚠ Verify before billing. Confirm against the current CMS/NCHS ICD-10-CM files and your payer's rules before claims submission.

Frequently asked questions

What is ICD-10 code S21.439A?

ICD-10-CM code S21.439A represents Puncture wound without foreign body of unspecified back wall of thorax with penetration into thoracic cavity, initial encounter. It is a billable diagnosis code in the Injury, Poisoning and Certain Other Consequences of External Causes chapter, effective October 1, 2025 – September 30, 2026.

Is S21.439A billable?

Yes. S21.439A is a valid billable ICD-10-CM code for insurance claims and clinical documentation.

What chapter is S21.439A in?

S21.439A belongs to the Injury, Poisoning and Certain Other Consequences of External Causes chapter (S00–T88) of ICD-10-CM.

Related codes in the S21 category

S21 Open wound of thorax Non-billable S21.0 Open wound of breast Non-billable S21.00 Unspecified open wound of breast Non-billable S21.01 Laceration without foreign body of breast Non-billable S21.02 Laceration with foreign body of breast Non-billable S21.03 Puncture wound without foreign body of breast Non-billable S21.001 Unspecified open wound of right breast Non-billable S21.002 Unspecified open wound of left breast Non-billable

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