T79.A12D – Traumatic compartment syndrome of left upper extremity, subsequent encounter

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

Billable code

ICD-10-CM code T79.A12D

Code: T79.A12D (claims format: T79A12D)
Description: Traumatic compartment syndrome of left upper extremity, subsequent encounter
Short description: Traumatic compartment syndrome of left upper extremity, subs
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.A › T79.A1 › T79.A12

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

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)

T79.A1 – Traumatic compartment syndrome of upper extremity

Applicable to:

Traumatic compartment syndrome of shoulder, arm, forearm, wrist, hand, and fingers

Related codes in T79.A12

Frequently asked questions

What is ICD-10 code T79.A12D?

T79.A12D is the ICD-10-CM code for traumatic compartment syndrome of left upper extremity, subsequent encounter, in the block T79 (Certain early complications of trauma (T79)).

Is T79.A12D a billable code?

Yes. T79.A12D is a billable/specific code that can be used to indicate a diagnosis for reimbursement purposes.

What category does T79.A12D 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.