I82.5Y2 — Chronic embolism and thrombosis of unspecified deep veins of left proximal lower extremity

BillableUnspecifiedCC

Is I82.5Y2 billable?

Yes, but I82.5Y2 is an unspecified code. I82.5Y2 is a valid, billable ICD-10-CM code for encounters from October 1, 2026 through September 30, 2027. However, I82.5Y2 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 I82.5Y2 — the more specific alternatives are listed below.

More specific alternatives

I82.5Y2 at a glance

Code	I82.5Y2
Description	Chronic embolism and thrombosis of unspecified deep veins of left proximal lower extremity
Billable	Yes
Code set	ICD-10-CM FY2027
Valid for encounters	October 1, 2026 – September 30, 2027

Which MS-DRGs does I82.5Y2 group to?

I82.5Y2 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, I82.5Y2 is a complication or comorbidity (CC), which can move a stay into a higher-paying DRG.

How is I82.5Y2 listed in the Alphabetic Index?

The Alphabetic Index lists these routes under I82.5Y, the nearest indexed parent of I82.5Y2. Use them to find the family, then select the specific code.

Embolism › vein › deep › thigh › chronic (multiple) (paradoxical)
Thrombosis, thrombotic › vein › deep › thigh › chronic (bland) (multiple) (progressive) (silent) (vessel)
Thrombosis, thrombotic › vein › deep › upper leg › chronic (bland) (multiple) (progressive) (silent) (vessel)
Embolism › vein › lower extremity › proximal › deep › chronic (multiple) (paradoxical)
Thrombosis, thrombotic › vein › lower extremity › proximal › deep › chronic (bland) (multiple) (progressive) (silent) (vessel)

Excludes1 — never code together — inherited from I82.5

The conditions below can never be reported together with I82.5Y2 on the same claim. An Excludes1 note means the two conditions cannot occur in the same patient, so reporting both is a coding error.

personal history of venous embolism and thrombosis (Z86.718)

Code first — inherited from I82

The underlying condition below must be sequenced before I82.5Y2. I82.5Y2 describes a manifestation and cannot be the principal or first-listed diagnosis.

venous embolism and thrombosis complicating:
abortion, ectopic or molar pregnancy (O00-O07, O08.7)
pregnancy, childbirth and the puerperium (O22.-, O87.-)

Use additional code — inherited from I82.5

Report an additional code alongside I82.5Y2 to fully describe the condition. I82.5Y2 is sequenced first.

code, if applicable, for associated long-term (current) use of anticoagulants (Z79.01)

Excludes2 — not included here — inherited from Chapter 9

The conditions below are not part of I82.5Y2, but a patient may have both at the same time. When documentation supports it, I82.5Y2 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 I82