Enhanced MS-DRG Definitions Manual

ICD-10-CM Diagnosis code S21

Open wound of thorax

Code Hierarchy

Coding Guidelines for S21

S21 is a valid ICD-10-CM diagnosis code meaning 'Open wound of thorax'.

Purely Excluded Conditions

These diag codes should never be used at the same time as S21 because these conditions cannot occur together:

  • traumatic amputation (partial) of thorax (S28.1)

Two Codes Required to Describe Condition

Two codes may be required to fully describe the patient's condition, but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the patient encounter.

  • any associated injury, such as:
  • injury of heart (S26.-)
  • injury of intrathoracic organs (S27.-)
  • rib fracture (S22.3-, S22.4-)
  • spinal cord injury (S24.0-, S24.1-)
  • traumatic hemopneumothorax (S27.3)
  • traumatic hemothorax (S27.1)
  • traumatic pneumothorax (S27.0)
  • wound infection

Complications & Comorbid Conditions (CC/MCC) Rules for S21

S21 is not a CC or MCC.

DRG Mapping Rules for S21

S21 doesn't map to any MS-DRGs.

About the Turquoise Health MS-DRG Manual Browser

We build tools and machine learning systems that simplify healthcare revenue cycle operations. We were frustrated with the formatting of the MS-DRG rules, so we built our own solution.

MS-DRG rules and ICD-10 CM/PCS codes are automatically parsed from CMS's MS-DRG data files. All content is provided strictly “AS IS” and may contain parsing errors. If you spot an error, please let us know.

We have converted the MS-DRG logic into fully structured, machine-readable data. If you need structured data versions of the MS-DRG manuals, we would love to talk with you.

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