FY2027 ICD-10-CM reference
I82.4Y3: Acute embolism and thrombosis of unspecified deep veins of proximal lower extremity, bilateral
By the HCC Buddy Coding Team
The official ICD-10-CM descriptor is Acute embolism and thrombosis of unspecified deep veins of proximal lower extremity, bilateral. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Billable code. Verified against the official FY2027 order file.
FY2027 Tabular instructions
Instructions below include applicable chapter, section and parent-code notes. Each note identifies where it appears in the official source.
Excludes2
certain conditions originating in the perinatal period (P04-P96)
Source: I00-I99 (chapter, inherited).
Excludes2
certain infectious and parasitic diseases (A00-B99)
Source: I00-I99 (chapter, inherited).
Excludes2
complications of pregnancy, childbirth and the puerperium (O00-O9A)
Source: I00-I99 (chapter, inherited).
Excludes2
congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
Source: I00-I99 (chapter, inherited).
Excludes2
endocrine, nutritional and metabolic diseases (E00-E88)
Source: I00-I99 (chapter, inherited).
Excludes2
injury, poisoning and certain other consequences of external causes (S00-T88)
Source: I00-I99 (chapter, inherited).
Excludes2
neoplasms (C00-D49)
Source: I00-I99 (chapter, inherited).
Excludes2
symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
Source: I00-I99 (chapter, inherited).
Excludes2
systemic connective tissue disorders (M30-M36)
Source: I00-I99 (chapter, inherited).
Excludes2
transient cerebral ischemic attacks and related syndromes (G45.-)
Source: I00-I99 (chapter, inherited).
Code first
venous embolism and thrombosis complicating:
Source: I82 (category, inherited).
Code first
abortion, ectopic or molar pregnancy (O00-O07, O08.7)
Source: I82 (category, inherited).
Code first
pregnancy, childbirth and the puerperium (O22.-, O87.-)
Source: I82 (category, inherited).
Excludes2
venous embolism and thrombosis (of):
Source: I82 (category, inherited).
Excludes2
cerebral (I63.6, I67.6)
Source: I82 (category, inherited).
Excludes2
coronary (I21-I25)
Source: I82 (category, inherited).
Excludes2
intracranial and intraspinal, septic or NOS (G08)
Source: I82 (category, inherited).
Excludes2
intracranial, nonpyogenic (I67.6)
Source: I82 (category, inherited).
Excludes2
intraspinal, nonpyogenic (G95.1)
Source: I82 (category, inherited).
Excludes2
mesenteric (K55.0-)
Source: I82 (category, inherited).
Excludes2
portal (I81)
Source: I82 (category, inherited).
Excludes2
pulmonary (I26.-)
Source: I82 (category, inherited).
Instructional note
Acute embolism and thrombosis of deep vein of thigh NOS
Source: I82.4Y (self, inherited).
Instructional note
Acute embolism and thrombosis of deep vein of upper leg NOS
Source: I82.4Y (self, inherited).
Compare the FY2027 additions, removals and billable-status changes
What does I82.4Y3 mean in FY2027?
The official ICD-10-CM descriptor is Acute embolism and thrombosis of unspecified deep veins of proximal lower extremity, bilateral. The FY2027 annual edition starts October 1, 2026. Check the edition that applies to the encounter or inpatient discharge, including any April update.
Is I82.4Y3 billable in FY2027?
The FY2027 order file marks I82.4Y3 as billable. Check the complete Tabular instructions and documentation before assigning it.
Does I82.4Y3 map to an HCC?
In the CMS 2027 Initial ICD-10-CM Mappings (payment year 2027, 2026 dates of service), I82.4Y3 maps to CMS-HCC V28 HCC 267 (Deep Vein Thrombosis and Pulmonary Embolism). For 2027 dates of service, CMS has not yet published the payment year 2028 mappings. ESRD, RxHCC, PACE and HHS-HCC mappings are still pending verification for FY2027.
Source: CMS FY2027 ICD-10-CM order file. Read the FY2027 Official Guidelines.
Review the FY2026 April edition