I74.9 — Embolism and thrombosis of unspecified artery

BillableUnspecifiedCC

Is I74.9 billable?

Yes, but I74.9 is an unspecified code. I74.9 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, I74.9 is an unspecified or catch-all code. Payers apply additional scrutiny to unspecified codes and many deny them when the medical record supports a more specific option, so check the documentation before selecting I74.9 — the more specific alternatives are listed below.

More specific alternatives

I74.9 at a glance

Code	I74.9
Description	Embolism and thrombosis of unspecified artery
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does I74.9 group to?

I74.9 sits in MDC 05 and helps define the logic of 3 MS-DRGs (version 44, FY2027). Which one a stay actually groups to also depends on procedures and secondary diagnoses.

299Peripheral Vascular Disorders with MCCmedical
300Peripheral Vascular Disorders with CCmedical
301Peripheral Vascular Disorders without CC/MCCmedical

As a secondary diagnosis, I74.9 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is I74.9 listed in the Alphabetic Index?

These are the routes through the Alphabetic Index that lead to I74.9. They show the wording a clinician may have documented, which often differs from the Tabular description.

Embolism (multiple) (paradoxical)
Clot › circulation (blood)
Embolism › artery (multiple) (paradoxical)
Thrombosis, thrombotic › artery, arteries (bland) (multiple) (progressive) (silent) (vessel)

Code first — inherited from I74

The underlying condition below must be sequenced before I74.9. I74.9 describes a manifestation and cannot be the principal or first-listed diagnosis.

embolism and thrombosis complicating abortion or ectopic or molar pregnancy (O00-O07, O08.2)
embolism and thrombosis complicating pregnancy, childbirth and the puerperium (O88.-)

Excludes2 — not included here — inherited from Chapter 9

The conditions below are not part of I74.9, but a patient may have both at the same time. When documentation supports it, I74.9 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 I74

The conditions below are not part of I74.9, but a patient may have both at the same time. When documentation supports it, I74.9 and the excluded code may both be reported.

atheroembolism (I75.-)
basilar embolism and thrombosis (I63.0-I63.2, I65.1)
carotid embolism and thrombosis (I63.0-I63.2, I65.2)
cerebral embolism and thrombosis (I63.3-I63.5, I66.-)
coronary embolism and thrombosis (I21-I25)
mesenteric embolism and thrombosis (K55.0-)
ophthalmic embolism and thrombosis (H34.-)
precerebral embolism and thrombosis NOS (I63.0-I63.2, I65.9)
pulmonary embolism and thrombosis (I26.-)
renal embolism and thrombosis (N28.0)
retinal embolism and thrombosis (H34.-)
septic embolism and thrombosis (I76)
vertebral embolism and thrombosis (I63.0-I63.2, I65.0)

How long has I74.9 existed?

I74.9 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.