Is T79.4XXA a billable ICD-10-CM code?

Yes. T79.4XXA is a billable, specific ICD-10-CM code and is valid for submission on a claim.

Where does T79.4XXA sit in the tabular list?

Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Certain early complications of trauma (T79).

What cannot be coded together with T79.4XXA?

T79.4XXA carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.

T79.4XXA

T79.4XXA — Traumatic shock, initial encounter

Billable / specific codeICD-10-CM

T79.4XXA is a billable, specific ICD-10-CM code for traumatic shock, initial encounter. It is valid for submission on a claim.

7th 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

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.

Medicare coverage

T79.4XXA is named in 14 Medicare coverage policies — 14 listing it as supporting medical necessity. Which of them applies to you depends on your Medicare contractor, and coverage genuinely differs by state.

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)

Related codes at this level

Codes that share T79.4. If T79.4XXA is not quite right, the correct code is usually one of these.

Questions about T79.4XXA

Is T79.4XXA a billable ICD-10-CM code?: Yes. T79.4XXA is a billable, specific ICD-10-CM code and is valid for submission on a claim.
Where does T79.4XXA sit in the tabular list?: Injury, poisoning and certain other consequences of external causes (S00-T88), in the block Certain early complications of trauma (T79).
What cannot be coded together with T79.4XXA?: T79.4XXA carries an Excludes1 note, which means the conditions it lists can never be coded together with it on the same encounter.