ICD-10 T79.4
Non-Billable HeaderTraumatic shock
About ICD-10-CM T79.4
ICD-10-CM code T79.4 represents Traumatic shock. This is a non-billable header code in the Injury, Poisoning, and External Causes chapter (block T79). The 2026 edition of ICD-10-CM T79.4 became effective on October 1, 2025. Non-billable codes cannot be used as a primary or secondary diagnosis on a claim, use a more specific child code instead.
Coding Tips for T79.4
Specialist guidance from the PayerReady Medical Coding Team. Specificity warnings, HCC capture rules, sequencing notes.
Injury codes require a 7th character: A (initial encounter, active treatment), D (subsequent, healing/recovery), S (sequela, late effect of original injury). Codes with fewer than 6 characters need the placeholder X to bring them to 6 characters before adding the 7th. Wrong or missing 7th character is the #1 cause of injury claim denials.
Inclusion Terms / Approximate Synonyms
Clinical terms and conditions classified under T79.4. Per CMS ICD-10-CM Tabular 2026.
- Shock (immediate) (delayed) following injury
Type 1 Excludes
Pure excludes, these codes can never be coded together with T79.4. The conditions are mutually exclusive (e.g., congenital vs acquired forms).
- 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)
Medicare LCD Coverage for T79.4
Local Coverage Determinations (LCDs) from CMS MACs that list T79.4 as a covered diagnosis.
This doesn't mean the code isn't covered, it means no MAC has issued a Local Coverage Determination naming this specific code. Coverage may still apply under National Coverage Determinations or general medical-necessity rules.
Commercial Payer Coverage
Coverage policies from major commercial payers referencing T79.4.
Our payer policy database covers Aetna, Cigna, Anthem, BCBS, Humana, and Medicare Advantage plans, but T79.4 doesn't currently appear in any indexed policy. The code may still be covered under standard plan benefits.
CPT Codes Commonly Billed with T79.4
Procedures frequently paired with this diagnosis based on PayerReady's Dx↔Px linkage data.
We don't have CPT pairings indexed for this specific code yet. Use the CPT search above to find common procedures, or check your payer's published medical policy for code-specific guidance.
Codes Adjacent To T79.4
Other codes in section T79 (Certain early complications of trauma).
ICD-10 T79.4, Billing FAQ
Is ICD-10 code T79.4 billable? +
No, T79.4 is a non-billable header code. Use a more specific child code from block T79 when submitting claims.
What other names or terms map to T79.4? +
ICD-10 T79.4 includes: Shock (immediate) (delayed) following injury.
What codes are Type 1 Excludes for T79.4? +
Type 1 Excludes (never code together with T79.4): 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-)
Get the full PayerReady toolkit
Free access to CPT/ICD-10 lookup, denial appeals, fee comparator, and claim auditing with credentialing enrollment.
Start free →Run this code through our claim audit tool
Check NCCI bundling, MUE limits, and modifier logic before submission.
Try the auditor →Did this page help?
Quick signal so we know what to improve.
If you want a code reference page that doesn't exist yet, email coding@payerready.com.
Tell us what's missing or wrong: coding@payerready.com. We respond within 5 business days.
Reviewed by the PayerReady Medical Coding Team
Verified against the CMS 2026 code set on May 31, 2026.
Powered by 11K CPT · 98K ICD-10 · 860K MPFS rates · 4.5M NCCI edits · 9.5M NPIs. Our data methodology · About our coding team