T79.9XXS – Unspecified early complication of trauma, sequela

ICD-10-CM 2027 diagnosis code · Certain early complications of trauma (T79)

Billable code

ICD-10-CM code T79.9XXS

Code: T79.9XXS (claims format: T799XXS)
Description: Unspecified early complication of trauma, sequela
Billable: Yes – valid for HIPAA-covered transactions
Valid for: Dates of service October 1, 2026 – September 30, 2027 (FY2027)
Chapter: 19. Injury, poisoning and certain other consequences of external causes (S00-T88)
Block: T79 Certain early complications of trauma (T79)
Parent codes: T79 › T79.9

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care.

Character	Meaning
`A`	initial encounter
`D`	subsequent encounter
`S`	sequela

Notes inherited from parent codes

Instructional notes at a category or block level apply to every code below it.

T79 – Certain early complications of trauma, not elsewhere classified

Excludes2 (not included here):

acute respiratory distress syndrome (J80)
complications occurring during or following medical procedures (T80-T88)
complications of surgical and medical care NEC (T80-T88)
newborn respiratory distress syndrome (P22.0)

7th character note:

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

Related codes in T79.9

Frequently asked questions

What is ICD-10 code T79.9XXS?

T79.9XXS is the ICD-10-CM code for unspecified early complication of trauma, sequela, in the block T79 (Certain early complications of trauma (T79)).

Is T79.9XXS a billable code?

Yes. T79.9XXS is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does T79.9XXS belong to?

It belongs to category T79 – Certain early complications of trauma, not elsewhere classified.

Source: CDC/NCHS ICD-10-CM FY2027 code files, tabular list and index. Reference only – code assignment must follow the official ICD-10-CM guidelines and documentation in the medical record.