T79.A0 – Compartment syndrome, unspecified

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

Non-billable header

ICD-10-CM code T79.A0

Code: T79.A0 (claims format: T79A0)
Description: Compartment syndrome, unspecified
Billable: No – use a more specific code below
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.A

Billable codes under T79.A0

T79.A0 is a header code and cannot be used on claims. Choose the most specific code:

7th character values

Codes in this category need a 7th character to describe the encounter or episode of care (use placeholder X for empty positions).

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

Notes for T79.A0

Applicable to:

Compartment syndrome NOS

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

T79.A – Traumatic compartment syndrome

Excludes1 (not coded here):

fibromyalgia (M79.7)
nontraumatic compartment syndrome (M79.A-)

Excludes2 (not included here):

traumatic ischemic infarction of muscle (T79.6)

Index terms for T79.A0

Entries in the ICD-10-CM alphabetic index that lead to this code:

Related codes in T79.A

Frequently asked questions

What is ICD-10 code T79.A0?

T79.A0 is the ICD-10-CM code for compartment syndrome, unspecified, in the block T79 (Certain early complications of trauma (T79)).

Is T79.A0 a billable code?

No. T79.A0 is a header code with more specific child codes; report one of the billable codes listed above.

What category does T79.A0 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.