I77.77 Dissection of artery of lower extremity

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

Applies from I77 Other disorders of arteries and arterioles

Excludes2 (not included here)

• collagen (vascular) diseases (M30-M36)
• hypersensitivity angiitis (M31.0)
• pulmonary artery (I28.-)

Applies from I77.7 Other arterial dissection

Excludes2 (not included here)

• dissection of aorta (I71.0-)
• dissection of coronary artery (I25.42)

Risk adjustment (HCC)

• CMS-HCC V22: HCC 107 — Vascular Disease with Complications
• ESRD V24: HCC 107

MS-DRG index

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

Approximate ICD-9-CM (GEMs)

• 443.29 Dissection of other artery (approximate)

Diagnosis Index entries for I77.77

• Dissection › artery › extremity › lower

Nearby codes

• I77.72 Dissection of iliac artery
• I77.73 Dissection of renal artery
• I77.74 Dissection of vertebral artery
• I77.75 Dissection of other precerebral arteries
• I77.76 Dissection of artery of upper extremity
• I77.77 Dissection of artery of lower extremity (this code)
• I77.79 Dissection of other specified artery
• I77.8 Other specified disorders of arteries and arterioles
• I77.81 Aortic ectasia
• I77.810 Thoracic aortic ectasia
• I77.811 Abdominal aortic ectasia