T79.7XXA — Traumatic subcutaneous emphysema, initial encounter
Is T79.7XXA billable?
Yes — T79.7XXA is billable for FY2027. T79.7XXA is a valid, billable ICD-10-CM code at the highest level of specificity in its branch. T79.7XXA may be submitted for encounters from October 1, 2026 through September 30, 2027.
T79.7XXA at a glance
| Code | T79.7XXA |
|---|---|
| Description | Traumatic subcutaneous emphysema, initial encounter |
| Billable | Yes |
| Code set | ICD-10-CM FY2027 |
| Valid for encounters | October 1, 2026 – September 30, 2027 |
| 7th character "A" | initial encounter |
What does the 7th character "A" mean in T79.7XXA?
In T79.7XXA, the 7th character A means initial encounter. The 7th character is required for T79.7XXA to be a valid, complete code.
Same condition, different episode of care — switch the 7th character:
Which MS-DRGs does T79.7XXA group to?
T79.7XXA sits in MDC 04 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.
- 199Pneumothorax with MCCmedical
- 200Pneumothorax with CCmedical
- 201Pneumothorax without CC/MCCmedical
As a secondary diagnosis, T79.7XXA is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.
How is T79.7XXA listed in the Alphabetic Index?
The Alphabetic Index lists these routes under T79.7, the nearest indexed parent of T79.7XXA. Use them to find the family, then select the specific code.
- Aerodermectasia › subcutaneous
- Emphysema › cellular tissue (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
- Emphysema › connective tissue (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
- Emphysema › laminated tissue (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
- Emphysema › subcutaneous (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
- Emphysema › traumatic (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
- Emphysema › eyelid › traumatic (atrophic) (bullous) (chronic) (interlobular) (lung) (obstructive) (pulmonary) (senile) (vesicular)
Excludes2 — not included here
The conditions below are not part of T79.7XXA, but a patient may have both at the same time. When documentation supports it, T79.7XXA and the excluded code may both be reported.
Use additional code — inherited from Chapter 19
Report an additional code alongside T79.7XXA to fully describe the condition. T79.7XXA is sequenced first.
- code to identify any retained foreign body, if applicable (Z18.-)
Excludes2 — not included here — inherited from Chapter 19
The conditions below are not part of T79.7XXA, but a patient may have both at the same time. When documentation supports it, T79.7XXA and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79
The conditions below are not part of T79.7XXA, but a patient may have both at the same time. When documentation supports it, T79.7XXA and the excluded code may both be reported.
Excludes2 — not included here — inherited from T79.7
The conditions below are not part of T79.7XXA, but a patient may have both at the same time. When documentation supports it, T79.7XXA and the excluded code may both be reported.
How long has T79.7XXA existed?
T79.7XXA has been in ICD-10-CM since at least FY2016, the earliest fiscal year on record here.
Derived from the official order files for FY2016–FY2026. FY2017 and FY2020 publish no order file, so those years are not covered.