I25.4 — Coronary artery aneurysm and dissection

Not billable

Is I25.4 billable?

No — I25.4 is a non-billable header code. I25.4 groups more specific codes and cannot be submitted on a claim. A valid ICD-10-CM code must be reported at the highest level of specificity available in its branch. Select one of the 2 billable codes beneath I25.4.

Billable codes under this header

I25.4 at a glance

Code	I25.4
Description	Coronary artery aneurysm and dissection
Billable	No — header code
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Use additional code — inherited from I25

Report an additional code alongside I25.4 to fully describe the condition. I25.4 is sequenced first.

code to identify:
chronic total occlusion of coronary artery (I25.82)
exposure to environmental tobacco smoke (Z77.22)
history of tobacco dependence (Z87.891)
occupational exposure to environmental tobacco smoke (Z57.31)
tobacco dependence (F17.-)
tobacco use (Z72.0)

Excludes2 — not included here — inherited from Chapter 9

The conditions below are not part of I25.4, but a patient may have both at the same time. When documentation supports it, I25.4 and the excluded code may both be reported.

certain conditions originating in the perinatal period (P04-P96)
certain infectious and parasitic diseases (A00-B99)
complications of pregnancy, childbirth and the puerperium (O00-O9A)
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
endocrine, nutritional and metabolic diseases (E00-E88)
injury, poisoning and certain other consequences of external causes (S00-T88)
neoplasms (C00-D49)
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
systemic connective tissue disorders (M30-M36)
transient cerebral ischemic attacks and related syndromes (G45.-)

Excludes2 — not included here — inherited from I25

The conditions below are not part of I25.4, but a patient may have both at the same time. When documentation supports it, I25.4 and the excluded code may both be reported.

non-ischemic myocardial injury (I5A)

Code also — inherited from I20-I25

Two codes may be needed to describe the condition fully. Whether I25.4 is sequenced first depends on the reason for the encounter.

the presence of hypertension (I10-I1A)

What codes fall under I25.4? (2)

How long has I25.4 existed?

I25.4 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.