ICD-10-CM 2027
ICD-10 code for aneurysm
From the official ICD-10-CM alphabetic index entry “Aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular)”. Page updated September 29, 2026.
About coding aneurysm
The ICD-10-CM code for aneurysm is I72.9 (Aneurysm of unspecified site). The official index lists 189 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I72.9.
Within I72, choose I72.9 (unspecified site) only when documentation doesn't support a more specific option: carotid artery (I72.0), artery of upper extremity (I72.1), renal artery (I72.2), iliac artery (I72.3), artery of lower extremity (I72.4), other precerebral arteries (I72.5), vertebral artery (I72.6) and other specified arteries (I72.8).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
In MS-DRG v44.0, it is part of the grouping logic for DRG 299 (Peripheral Vascular Disorders with MCC, relative weight 1.5842), DRG 300 (Peripheral Vascular Disorders with CC, relative weight 1.0464) and DRG 301 (Peripheral Vascular Disorders without CC/MCC, relative weight 0.7133), in MDC 05 (Diseases and Disorders of the Circulatory System), as a principal or secondary diagnosis. The DRG a claim lands in depends on the principal diagnosis, procedures and any CC/MCC secondary diagnoses.
More specific aneurysm codes (official index)
- abdominal (aorta) I71.40 — Abdominal aortic aneurysm, without rupture, unspecified
- infrarenal I71.43 — Infrarenal abdominal aortic aneurysm, without rupture
- ruptured I71.33 — Infrarenal abdominal aortic aneurysm, ruptured
- juxtarenal I71.42 — Juxtarenal abdominal aortic aneurysm, without rupture
- ruptured I71.32 — Juxtarenal abdominal aortic aneurysm, ruptured
- pararenal I71.41 — Pararenal abdominal aortic aneurysm, without rupture
- ruptured I71.31 — Pararenal abdominal aortic aneurysm, ruptured
- ruptured I71.30 — Abdominal aortic aneurysm, ruptured, unspecified
- syphilitic A52.01 — Syphilitic aneurysm of aorta
- aorta, aortic (nonsyphilitic) I71.9 — Aortic aneurysm of unspecified site, without rupture
- abdominal I71.40 — Abdominal aortic aneurysm, without rupture, unspecified
- dissecting
- ruptured I71.30 — Abdominal aortic aneurysm, ruptured, unspecified
- arch I71.22 — Aneurysm of the aortic arch, without rupture
- ruptured I71.12 — Aneurysm of the aortic arch, ruptured
- arteriosclerotic I71.9 — Aortic aneurysm of unspecified site, without rupture
- ruptured I71.8 — Aortic aneurysm of unspecified site, ruptured
- ascending I71.21 — Aneurysm of the ascending aorta, without rupture
- ruptured I71.11 — Aneurysm of the ascending aorta, ruptured
- congenital Q25.43 — Congenital aneurysm of aorta
- descending I71.9 — Aortic aneurysm of unspecified site, without rupture
- abdominal I71.40 — Abdominal aortic aneurysm, without rupture, unspecified
- ruptured I71.30 — Abdominal aortic aneurysm, ruptured, unspecified
- ruptured I71.8 — Aortic aneurysm of unspecified site, ruptured
- thoracic I71.23 — Aneurysm of the descending thoracic aorta, without rupture
- ruptured I71.13 — Aneurysm of the descending thoracic aorta, ruptured
- dissecting
- root Q25.43 — Congenital aneurysm of aorta
- ruptured I71.8 — Aortic aneurysm of unspecified site, ruptured
- sinus, congenital Q25.43 — Congenital aneurysm of aorta
- syphilitic A52.01 — Syphilitic aneurysm of aorta
- thoracic I71.20 — Thoracic aortic aneurysm, without rupture, unspecified
- ruptured I71.10 — Thoracic aortic aneurysm, ruptured, unspecified
- thoracoabdominal I71.60 — Thoracoabdominal aortic aneurysm, without rupture, unspecified
- paravisceral I71.62 — Paravisceral aneurysm of the thoracoabdominal aorta, without rupture
- ruptured I71.52 — Paravisceral aneurysm of the thoracoabdominal aorta, ruptured
- ruptured I71.50 — Thoracoabdominal aortic aneurysm, ruptured, unspecified
- supraceliac I71.61 — Supraceliac aneurysm of the thoracoabdominal aorta, without rupture
- ruptured I71.51 — Supraceliac aneurysm of the thoracoabdominal aorta, ruptured
- thorax, thoracic I71.20 — Thoracic aortic aneurysm, without rupture, unspecified
- arch I71.22 — Aneurysm of the aortic arch, without rupture
- ruptured I71.12 — Aneurysm of the aortic arch, ruptured
- ascending I71.21 — Aneurysm of the ascending aorta, without rupture
- ruptured I71.11 — Aneurysm of the ascending aorta, ruptured
- descending I71.23 — Aneurysm of the descending thoracic aorta, without rupture
- ruptured I71.13 — Aneurysm of the descending thoracic aorta, ruptured
- ruptured I71.10 — Thoracic aortic aneurysm, ruptured, unspecified
- arch I71.12 — Aneurysm of the aortic arch, ruptured
- ascending I71.11 — Aneurysm of the ascending aorta, ruptured
- descending I71.13 — Aneurysm of the descending thoracic aorta, ruptured
- transverse I71.22 — Aneurysm of the aortic arch, without rupture
- ruptured I71.12 — Aneurysm of the aortic arch, ruptured
- valve (heart) I35.8 — Other nonrheumatic aortic valve disorders
- arteriosclerotic I72.9 — Aneurysm of unspecified site
- cerebral I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- arteriovenous (congenital)
- acquired I77.0 — Arteriovenous fistula, acquired
- brain I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- coronary I25.41 — Coronary artery aneurysm
- pulmonary I28.0 — Arteriovenous fistula of pulmonary vessels
- brain Q28.2 — Arteriovenous malformation of cerebral vessels
- ruptured I60.8 — Other nontraumatic subarachnoid hemorrhage
- intracerebral I61.8 — Other nontraumatic intracerebral hemorrhage
- intraparenchymal I61.8 — Other nontraumatic intracerebral hemorrhage
- intraventricular I61.5 — Nontraumatic intracerebral hemorrhage, intraventricular
- subarachnoid I60.8 — Other nontraumatic subarachnoid hemorrhage
- peripheral
- precerebral vessels Q28.0 — Arteriovenous malformation of precerebral vessels
- specified site NEC
- acquired I77.0 — Arteriovenous fistula, acquired
- basal
- basilar (trunk) I72.5 — Aneurysm of other precerebral arteries
- berry (congenital) (nonruptured) I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- brain I67.1 — Cerebral aneurysm, nonruptured
- arteriosclerotic I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- arteriovenous (congenital) (nonruptured) Q28.2 — Arteriovenous malformation of cerebral vessels
- acquired I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- ruptured
- berry (congenital) (nonruptured) I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- congenital Q28.3 — Other malformations of cerebral vessels
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- meninges I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.8 — Other nontraumatic subarachnoid hemorrhage
- miliary (congenital) (nonruptured) I67.1 — Cerebral aneurysm, nonruptured
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- mycotic I67.1 — Cerebral aneurysm, nonruptured
- with endocarditis
- ruptured
- syphilitic (hemorrhage) A52.05 — Other cerebrovascular syphilis
- cardiac (false) I25.3 — Aneurysm of heart
- carotid artery (common) (external) I72.0 — Aneurysm of carotid artery
- internal (intracranial) I67.1 — Cerebral aneurysm, nonruptured
- extracranial portion I72.0 — Aneurysm of carotid artery
- ruptured into brain I60.0 — Nontraumatic subarachnoid hemorrhage from carotid siphon and bifurcation
- syphilitic A52.09 — Other cardiovascular syphilis
- intracranial A52.05 — Other cerebrovascular syphilis
- cavernous sinus I67.1 — Cerebral aneurysm, nonruptured
- arteriovenous (congenital) (nonruptured) Q28.3 — Other malformations of cerebral vessels
- ruptured I60.8 — Other nontraumatic subarachnoid hemorrhage
- celiac I72.8 — Aneurysm of other specified arteries
- central nervous system, syphilitic A52.05 — Other cerebrovascular syphilis
- cerebral
- chest
- circle of Willis I67.1 — Cerebral aneurysm, nonruptured
- congenital Q28.3 — Other malformations of cerebral vessels
- ruptured I60.6 — Nontraumatic subarachnoid hemorrhage from other intracranial arteries
- ruptured I60.6 — Nontraumatic subarachnoid hemorrhage from other intracranial arteries
- common iliac artery I72.3 — Aneurysm of iliac artery
- congenital (peripheral) Q27.8 — Other specified congenital malformations of peripheral vascular system
- aorta (root) (sinus) Q25.43 — Congenital aneurysm of aorta
- brain Q28.3 — Other malformations of cerebral vessels
- ruptured I60.7 — Nontraumatic subarachnoid hemorrhage from unspecified intracranial artery
- coronary Q24.5 — Malformation of coronary vessels
- digestive system Q27.8 — Other specified congenital malformations of peripheral vascular system
- lower limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- pulmonary Q25.79 — Other congenital malformations of pulmonary artery
- retina Q14.1 — Congenital malformation of retina
- specified site NEC Q27.8 — Other specified congenital malformations of peripheral vascular system
- upper limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- conjunctiva
- conus arteriosus
- coronary (arteriosclerotic) (artery) I25.41 — Coronary artery aneurysm
- arteriovenous, congenital Q24.5 — Malformation of coronary vessels
- congenital Q24.5 — Malformation of coronary vessels
- ruptured
- syphilitic A52.06 — Other syphilitic heart involvement
- vein I25.89 — Other forms of chronic ischemic heart disease
- cylindroid (aorta) I71.9 — Aortic aneurysm of unspecified site, without rupture
- ruptured I71.8 — Aortic aneurysm of unspecified site, ruptured
- syphilitic A52.01 — Syphilitic aneurysm of aorta
- ductus arteriosus Q25.0 — Patent ductus arteriosus
- endocardial, infective (any valve) I33.0 — Acute and subacute infective endocarditis
- femoral (artery) (ruptured) I72.4 — Aneurysm of artery of lower extremity
- gastroduodenal I72.8 — Aneurysm of other specified arteries
- gastroepiploic I72.8 — Aneurysm of other specified arteries
- heart (wall) (chronic or with a stated duration of over 4 weeks) I25.3 — Aneurysm of heart
- valve
- hepatic I72.8 — Aneurysm of other specified arteries
- iliac (common) (artery) (ruptured) I72.3 — Aneurysm of iliac artery
- infective I72.9 — Aneurysm of unspecified site
- endocardial (any valve) I33.0 — Acute and subacute infective endocarditis
- innominate (nonsyphilitic) I72.8 — Aneurysm of other specified arteries
- syphilitic A52.09 — Other cardiovascular syphilis
- interauricular septum
- interventricular septum
- intrathoracic (nonsyphilitic) I71.20 — Thoracic aortic aneurysm, without rupture, unspecified
- ruptured I71.10 — Thoracic aortic aneurysm, ruptured, unspecified
- syphilitic A52.01 — Syphilitic aneurysm of aorta
- lower limb I72.4 — Aneurysm of artery of lower extremity
- lung (pulmonary artery) I28.1 — Aneurysm of pulmonary artery
- mediastinal (nonsyphilitic) I72.8 — Aneurysm of other specified arteries
- syphilitic A52.09 — Other cardiovascular syphilis
- miliary (congenital) I67.1 — Cerebral aneurysm, nonruptured
- ruptured
- mitral (heart) (valve) I34.89 — Other nonrheumatic mitral valve disorders
- mural
- mycotic I72.9 — Aneurysm of unspecified site
- endocardial (any valve) I33.0 — Acute and subacute infective endocarditis
- ruptured, brain
- myocardium
- neck I72.0 — Aneurysm of carotid artery
- pancreaticoduodenal I72.8 — Aneurysm of other specified arteries
- patent ductus arteriosus Q25.0 — Patent ductus arteriosus
- peripheral NEC I72.8 — Aneurysm of other specified arteries
- congenital Q27.8 — Other specified congenital malformations of peripheral vascular system
- digestive system Q27.8 — Other specified congenital malformations of peripheral vascular system
- lower limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- specified site NEC Q27.8 — Other specified congenital malformations of peripheral vascular system
- upper limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- popliteal (artery) (ruptured) I72.4 — Aneurysm of artery of lower extremity
- precerebral
- congenital (nonruptured) Q28.1 — Other malformations of precerebral vessels
- specified site, NEC I72.5 — Aneurysm of other precerebral arteries
- pulmonary I28.1 — Aneurysm of pulmonary artery
- arteriovenous Q25.72 — Congenital pulmonary arteriovenous malformation
- acquired I28.0 — Arteriovenous fistula of pulmonary vessels
- syphilitic A52.09 — Other cardiovascular syphilis
- valve (heart)
- racemose (peripheral) I72.9 — Aneurysm of unspecified site
- congenital
- radial I72.1 — Aneurysm of artery of upper extremity
- Rasmussen NEC A15.0 — Tuberculosis of lung
- renal (artery) I72.2 — Aneurysm of renal artery
- retina
- congenital Q14.1 — Congenital malformation of retina
- diabetic
- sinus of Valsalva Q25.43 — Congenital aneurysm of aorta
- specified NEC I72.8 — Aneurysm of other specified arteries
- spinal (cord) I72.8 — Aneurysm of other specified arteries
- syphilitic (hemorrhage) A52.09 — Other cardiovascular syphilis
- splenic I72.8 — Aneurysm of other specified arteries
- subclavian (artery) (ruptured) I72.8 — Aneurysm of other specified arteries
- syphilitic A52.09 — Other cardiovascular syphilis
- superior mesenteric I72.8 — Aneurysm of other specified arteries
- syphilitic (aorta) A52.01 — Syphilitic aneurysm of aorta
- central nervous system A52.05 — Other cerebrovascular syphilis
- congenital (late) A50.54 — Late congenital cardiovascular syphilis
- spine, spinal A52.09 — Other cardiovascular syphilis
- thoracoabdominal (aorta) I71.60 — Thoracoabdominal aortic aneurysm, without rupture, unspecified
- ruptured I71.50 — Thoracoabdominal aortic aneurysm, ruptured, unspecified
- syphilitic A52.01 — Syphilitic aneurysm of aorta
- thorax, thoracic (aorta) (arch) (nonsyphilitic)
- ruptured
- syphilitic A52.01 — Syphilitic aneurysm of aorta
- traumatic (complication) (early), specified site
- tricuspid (heart) (valve) I07.8 — Other rheumatic tricuspid valve diseases
- ulnar I72.1 — Aneurysm of artery of upper extremity
- upper limb (ruptured) I72.1 — Aneurysm of artery of upper extremity
- valve, valvular
- venous I86.8 — Varicose veins of other specified sites
- congenital Q27.8 — Other specified congenital malformations of peripheral vascular system
- digestive system Q27.8 — Other specified congenital malformations of peripheral vascular system
- lower limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- specified site NEC Q27.8 — Other specified congenital malformations of peripheral vascular system
- upper limb Q27.8 — Other specified congenital malformations of peripheral vascular system
- ventricle
- vertebral artery I72.6 — Aneurysm of vertebral artery
- visceral NEC I72.8 — Aneurysm of other specified arteries
Common questions about aneurysm ICD-10 codes
What is the ICD-10 code for aneurysm?
- I72.9 — Aneurysm of unspecified site. More specific codes apply when the documentation supports them: I71.40, I71.43, I71.33, I71.42 and others below.
What is the ICD-10 code for abdominal aneurysm?
- I71.40 — Abdominal aortic aneurysm, without rupture, unspecified.
What is the ICD-10 code for arteriosclerotic aneurysm?
- I72.9 — Aneurysm of unspecified site.
What is the ICD-10 code for basilar aneurysm?
- I72.5 — Aneurysm of other precerebral arteries.
What is the ICD-10 code for berry aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured.
What is the ICD-10 code for brain aneurysm?
- I67.1 — Cerebral aneurysm, nonruptured.
What is the ICD-10 code for cardiac aneurysm?
- I25.3 — Aneurysm of heart.
Is I72.9 billable?
- Yes. I72.9 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I72.9 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I72.9 as a principal diagnosis.
Is I72.9 a CC or MCC?
- No. I72.9 is neither a CC nor an MCC under MS-DRG v44.0.