I77.71 Dissection of carotid artery

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)

• 443.21 Dissection of carotid artery

Code annotations containing back-references to I77.71

Back-references to I77.71

• Type 2 Excludes: I72 Other aneurysm ("carotid artery dissection (I77.71)")
• Type 2 Excludes: I72.5 Aneurysm of other precerebral arteries ("dissection of carotid artery (I77.71)")
• Type 2 Excludes: I77.75 Dissection of other precerebral arteries ("dissection of carotid artery (I77.71)")

Diagnosis Index entries for I77.71

• Dissection › artery › carotid

Nearby codes

• I77.4 Celiac artery compression syndrome
• I77.5 Necrosis of artery
• I77.6 Arteritis, unspecified
• I77.7 Other arterial dissection
• I77.70 Dissection of unspecified artery
• I77.71 Dissection of carotid artery (this code)
• 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