Is T79.7 a billable ICD-10-CM code?

No. T79.7 is a non-billable header code. Code to a higher level of specificity using one of its child codes.

Where does T79.7 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).

T79.7

T79.7 — Traumatic subcutaneous emphysema

Non-billable headerICD-10-CM

T79.7 is a non-billable header ICD-10-CM code for traumatic subcutaneous emphysema. It cannot be billed on its own: choose one of the more specific child codes below. This code also requires a 7th character before it is complete.

This code requires a 7th character

The appropriate 7th character is to be added to each code from category T79

A: initial encounter
D: subsequent encounter
S: sequela

Excludes2 — not included here, but may coexist

The excluded condition is not part of this code, but a patient can have both. You may code both.

emphysema NOS (J43)
emphysema (subcutaneous) resulting from a procedure (T81.82)

Other codes that can never be billed with T79.7

These codes carry an Excludes1 note pointing at T79.7. The conflict binds both ways, but ICD-10-CM only writes it down on one side — so you would not find this by reading T79.7 alone.

J98.2Interstitial emphysema

Risk adjustment

T79.7 does not map to an HCC and does not risk-adjust under CMS-HCC V28. That is normal — most ICD-10 codes do not. It still needs to be coded correctly; it just will not move a RAF score.

How T79.7 is indexed

Coders do not find codes by browsing the tabular list — they look them up in the alphabetic index, under the word the physician wrote. These are the index entries that lead here, so you can see which chart wordings map to T79.7.

Aerodermectasia›subcutaneous(traumatic)
Emphysema›cellular tissue(traumatic)
Emphysema›connective tissue(traumatic)
Emphysema›laminated tissue
Emphysema›subcutaneous(traumatic)
Emphysema›traumatic(subcutaneous)
Emphysema›eyelid›traumatic

Code to one of these instead T79.7

3 child codes. Green means billable.

Related codes at this level

Codes that share T79. If T79.7 is not quite right, the correct code is usually one of these.

Questions about T79.7

Is T79.7 a billable ICD-10-CM code?: No. T79.7 is a non-billable header code. Code to a higher level of specificity using one of its child codes.
Where does T79.7 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).