I82.A29 Chronic embolism and thrombosis of unspecified axillary vein

Billable ICD-10-CM code, FY2026. Acts as a Complication or Comorbidity (CC) as a secondary diagnosis.

Applies from I82 Other venous embolism and thrombosis

Excludes2 (not included here)

• venous embolism and thrombosis (of):
• cerebral (I63.6, I67.6)
• coronary (I21-I25)
• intracranial and intraspinal, septic or NOS (G08)
• intracranial, nonpyogenic (I67.6)
• intraspinal, nonpyogenic (G95.1)
• mesenteric (K55.0-)
• portal (I81)
• pulmonary (I26.-)

Code first

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

Risk adjustment (HCC)

• CMS-HCC V28: HCC 267 — Deep Vein Thrombosis and Pulmonary Embolism
• CMS-HCC V22: HCC 108 — Vascular Disease
• RxHCC V08: HCC 215 — Venous Thromboembolism
• ESRD V24: HCC 108

MS-DRG index

Defines the logic of DRG(s) 299-301 in MDC 05.

Approximate ICD-9-CM (GEMs)

• 453.74 Chronic venous embolism and thrombosis of axillary veins (approximate)

Medicare Code Edits (MCE v43.1 (April 2026))

• Unspecified code (laterality): Unspecified codes for which a more specific code identifying laterality (right, left, bilateral) exists within the same code family.

Nearby codes

• I82.A19 Acute embolism and thrombosis of unspecified axillary vein
• I82.A2 Chronic embolism and thrombosis of axillary vein
• I82.A21 Chronic embolism and thrombosis of right axillary vein
• I82.A22 Chronic embolism and thrombosis of left axillary vein
• I82.A23 Chronic embolism and thrombosis of axillary vein, bilateral
• I82.A29 Chronic embolism and thrombosis of unspecified axillary vein (this code)
• I82.B Embolism and thrombosis of subclavian vein
• I82.B1 Acute embolism and thrombosis of subclavian vein
• I82.B11 Acute embolism and thrombosis of right subclavian vein
• I82.B12 Acute embolism and thrombosis of left subclavian vein
• I82.B13 Acute embolism and thrombosis of subclavian vein, bilateral