T79Not billable, use a more specific code below
Certain early complications of trauma, not elsewhere classified
chapter 19: Injury, Poisoning and Certain Other Consequences of External Causes
54 billable codes under T79: 4 are an MCC, 11 are a CC; 3 map to HCC 267 (Deep Vein Thrombosis and Pulmonary Embolism), HCC 2 (Septicemia, Sepsis, Systemic Inflammatory Response Syndrome/Shock).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
Covers 7th character use and coding of injuries, fractures, burns, drug and toxic effects, abuse and neglect, and complications of care (S00-T88).
- Application of 7th Characters in Chapter 19 (page 77)
- Coding of Injuries (page 78)
- Coding of Traumatic Fractures (page 79)
- Coding of Burns and Corrosions (page 80)
- Adverse Effects, Poisoning, Underdosing and Toxic Effects (page 82)
- Adult and child abuse, neglect and other maltreatment (page 85)
- Complications of care (page 85)
All codes under T79
T79 can't be used on a claim. Pick a billable code below; grey headings group them.
- T79.0Air embolism (traumatic)
- T79.0XXAAir embolism (traumatic), initial encounter
- T79.0XXDAir embolism (traumatic), subsequent encounter
- T79.0XXSAir embolism (traumatic), sequela
- T79.1Fat embolism (traumatic)
- T79.1XXAFat embolism (traumatic), initial encounter
- T79.1XXDFat embolism (traumatic), subsequent encounter
- T79.1XXSFat embolism (traumatic), sequela
- T79.2Traumatic secondary and recurrent hemorrhage and seroma
- T79.2XXATraumatic secondary and recurrent hemorrhage and seroma, initial encounter
- T79.2XXDTraumatic secondary and recurrent hemorrhage and seroma, subsequent encounter
- T79.2XXSTraumatic secondary and recurrent hemorrhage and seroma, sequela
- T79.4Traumatic shock
- T79.4XXATraumatic shock, initial encounter
- T79.4XXDTraumatic shock, subsequent encounter
- T79.4XXSTraumatic shock, sequela
- T79.5Traumatic anuria
- T79.5XXATraumatic anuria, initial encounter
- T79.5XXDTraumatic anuria, subsequent encounter
- T79.5XXSTraumatic anuria, sequela
- T79.6Traumatic ischemia of muscle
- T79.6XXATraumatic ischemia of muscle, initial encounter
- T79.6XXDTraumatic ischemia of muscle, subsequent encounter
- T79.6XXSTraumatic ischemia of muscle, sequela
- T79.7Traumatic subcutaneous emphysema
- T79.7XXATraumatic subcutaneous emphysema, initial encounter
- T79.7XXDTraumatic subcutaneous emphysema, subsequent encounter
- T79.7XXSTraumatic subcutaneous emphysema, sequela
- T79.8Other early complications of trauma
- T79.8XXAOther early complications of trauma, initial encounter
- T79.8XXDOther early complications of trauma, subsequent encounter
- T79.8XXSOther early complications of trauma, sequela
- T79.9Unspecified early complication of trauma
- T79.9XXAUnspecified early complication of trauma, initial encounter
- T79.9XXDUnspecified early complication of trauma, subsequent encounter
- T79.9XXSUnspecified early complication of trauma, sequela
- T79.ATraumatic compartment syndrome
- T79.A0Compartment syndrome, unspecified
- T79.A0XACompartment syndrome, unspecified, initial encounter
- T79.A0XDCompartment syndrome, unspecified, subsequent encounter
- T79.A0XSCompartment syndrome, unspecified, sequela
- T79.A1Traumatic compartment syndrome of upper extremity
- T79.A11Traumatic compartment syndrome of right upper extremity
- T79.A11ATraumatic compartment syndrome of right upper extremity, initial encounter
- T79.A11DTraumatic compartment syndrome of right upper extremity, subsequent encounter
- T79.A11STraumatic compartment syndrome of right upper extremity, sequela
- T79.A12Traumatic compartment syndrome of left upper extremity
- T79.A12ATraumatic compartment syndrome of left upper extremity, initial encounter
- T79.A12DTraumatic compartment syndrome of left upper extremity, subsequent encounter
- T79.A12STraumatic compartment syndrome of left upper extremity, sequela
- T79.A19Traumatic compartment syndrome of unspecified upper extremity
- T79.A19ATraumatic compartment syndrome of unspecified upper extremity, initial encounter
- T79.A19DTraumatic compartment syndrome of unspecified upper extremity, subsequent encounter
- T79.A19STraumatic compartment syndrome of unspecified upper extremity, sequela
- T79.A2Traumatic compartment syndrome of lower extremity
- T79.A21Traumatic compartment syndrome of right lower extremity
- T79.A21ATraumatic compartment syndrome of right lower extremity, initial encounter
- T79.A21DTraumatic compartment syndrome of right lower extremity, subsequent encounter
- T79.A21STraumatic compartment syndrome of right lower extremity, sequela
- T79.A22Traumatic compartment syndrome of left lower extremity
- T79.A22ATraumatic compartment syndrome of left lower extremity, initial encounter
- T79.A22DTraumatic compartment syndrome of left lower extremity, subsequent encounter
- T79.A22STraumatic compartment syndrome of left lower extremity, sequela
- T79.A29Traumatic compartment syndrome of unspecified lower extremity
- T79.A29ATraumatic compartment syndrome of unspecified lower extremity, initial encounter
- T79.A29DTraumatic compartment syndrome of unspecified lower extremity, subsequent encounter
- T79.A29STraumatic compartment syndrome of unspecified lower extremity, sequela
- T79.A3Traumatic compartment syndrome of abdomen
- T79.A3XATraumatic compartment syndrome of abdomen, initial encounter
- T79.A3XDTraumatic compartment syndrome of abdomen, subsequent encounter
- T79.A3XSTraumatic compartment syndrome of abdomen, sequela
- T79.A9Traumatic compartment syndrome of other sites
- T79.A9XATraumatic compartment syndrome of other sites, initial encounter
- T79.A9XDTraumatic compartment syndrome of other sites, subsequent encounter
- T79.A9XSTraumatic compartment syndrome of other sites, sequela
T79 MS-DRGs
As the principal diagnosis, the billable codes under T79 group to these 25 MS-DRGs (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 913 Traumatic Injury with MCC (18 of 54 codes)
- DRG 914 Traumatic Injury without MCC (18 of 54 codes)
- DRG 949 Aftercare with CC/MCC (18 of 54 codes)
- DRG 950 Aftercare without CC/MCC (18 of 54 codes)
- DRG 963 Other Multiple Significant Trauma with MCC (18 of 54 codes)
- DRG 964 Other Multiple Significant Trauma with CC (18 of 54 codes)
- DRG 965 Other Multiple Significant Trauma without CC/MCC (18 of 54 codes)
- DRG 922 Other Injury, Poisoning and Toxic Effect Diagnoses with MCC (13 of 54 codes)
- DRG 923 Other Injury, Poisoning and Toxic Effect Diagnoses without MCC (13 of 54 codes)
- DRG 791 Prematurity with Major Problems (6 of 54 codes)
- DRG 793 Full Term Neonate with Major Problems (6 of 54 codes)
- DRG 175 Pulmonary Embolism with MCC or Acute Cor Pulmonale (2 of 54 codes)
- DRG 176 Pulmonary Embolism without MCC (2 of 54 codes)
- DRG 199 Pneumothorax with MCC (1 of 54 codes)
- DRG 200 Pneumothorax with CC (1 of 54 codes)
- DRG 201 Pneumothorax without CC/MCC (1 of 54 codes)
- DRG 564 Other Musculoskeletal System and Connective Tissue Diagnoses with MCC (1 of 54 codes)
- DRG 565 Other Musculoskeletal System and Connective Tissue Diagnoses with CC (1 of 54 codes)
- DRG 566 Other Musculoskeletal System and Connective Tissue Diagnoses without CC/MCC (1 of 54 codes)
- DRG 673 Other Kidney and Urinary Tract Procedures with MCC (1 of 54 codes)
- DRG 674 Other Kidney and Urinary Tract Procedures with CC (1 of 54 codes)
- DRG 675 Other Kidney and Urinary Tract Procedures without CC/MCC (1 of 54 codes)
- DRG 682 Renal Failure with MCC (1 of 54 codes)
- DRG 683 Renal Failure with CC (1 of 54 codes)
- DRG 684 Renal Failure without CC/MCC (1 of 54 codes)
Code history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.