T79.4XXA: Traumatic shock, initial encounter
T79.4XXA is a billable, specific ICD-10-CM code for traumatic shock, initial encounter. It is valid for submission on a claim.
Check T79.4XXA with the rest of the claim: free scrubber7th character "A": initial encounter
The appropriate 7th character is to be added to each code from category T79
- A
- initial encounter
- D
- subsequent encounter
- S
- sequela
Excludes1: never code together
These conditions cannot occur together. Billing both on the same encounter is a denial.
- anaphylactic shock due to adverse food reaction (T78.0-)
- anaphylactic shock due to correct medicinal substance properly administered (T88.6)
- anaphylactic shock due to serum (T80.5-)
- anaphylactic shock NOS (T78.2)
- electric shock (T75.4)
- nontraumatic shock NEC (R57.-)
- obstetric shock (O75.1)
- postprocedural shock (T81.1-)
- septic shock (R65.21)
- shock complicating abortion or ectopic or molar pregnancy (O00-O07, O08.3)
- shock due to anesthesia (T88.2)
- shock due to lightning (T75.01)
- shock NOS (R57.9)
Inclusion terms
Alternative wordings a physician may use in the chart for this same code.
- Shock (immediate) (delayed) following injury
Excludes1 inherited from the categories above T79.4XXA
A category’s note binds every code beneath it.
Written on T79.4: Traumatic shock
- anaphylactic shock due to adverse food reaction (T78.0-)
- anaphylactic shock due to correct medicinal substance properly administered (T88.6)
- anaphylactic shock due to serum (T80.5-)
- anaphylactic shock NOS (T78.2)
- electric shock (T75.4)
- nontraumatic shock NEC (R57.-)
- obstetric shock (O75.1)
- postprocedural shock (T81.1-)
- septic shock (R65.21)
- shock complicating abortion or ectopic or molar pregnancy (O00-O07, O08.3)
- shock due to anesthesia (T88.2)
- shock due to lightning (T75.01)
- shock NOS (R57.9)
Excludes2 inherited from the categories above T79.4XXA
Not part of this code, but both may be coded when both are present.
Risk adjustment
T79.4XXA risk-adjusts. Under the CMS-HCC V28 model it maps to this category:
- HCC 2 Septicemia, Sepsis, Systemic Inflammatory Response Syndrome/Shock0.500 RAF
Coefficient shown for the Community Non-dual Aged segment. A higher HCC in the same hierarchy will suppress this one, so capturing it does not always add score. Look up the whole chart to see which of its HCCs the hierarchy would zero.
Medicare coverage
T79.4XXA is named in 13 Medicare coverage policies: 13 listing it as supporting medical necessity. Which one applies depends on your Medicare contractor.
- A52868Billing and Coding: Transesophageal Echocardiography (TEE)
- A56421Billing and Coding: CT of the Abdomen and Pelvis
- A56500Billing and Coding: Cardiac Catheterization and Coronary Angiography
- A56505Billing and Coding: Transesophageal Echocardiography (TEE)
Code history
Unchanged in every release from FY2024 to FY2027.