ICD-10 Code for Aneurysm

The default ICD-10-CM 2027 code for aneurysm (anastomotic) (artery) (cirsoid) (diffuse) (false) (fusiform) (multiple) (saccular) is I72.9 – Aneurysm of unspecified site. More specific codes depend on the details documented, as listed in the official index (69 codes, 68 billable).

Main code: I72.9 – Aneurysm of unspecified site
Billable: Yes

Index entries for Aneurysm

abdominal (aorta) – I71.40
- infrarenal – I71.43
  - ruptured – I71.33
- juxtarenal – I71.42
  - ruptured – I71.32
- pararenal – I71.41
  - ruptured – I71.31
- ruptured – I71.30
- syphilitic – A52.01
aorta, aortic (nonsyphilitic) – I71.9
- abdominal – I71.40
  - dissecting – see Dissection, aorta, abdominal
  - ruptured – I71.30
- arch – I71.22
  - ruptured – I71.12
- arteriosclerotic – I71.9
  - ruptured – I71.8
- ascending – I71.21
  - ruptured – I71.11
- congenital – Q25.43
- descending – I71.9
  - abdominal – I71.40
    - ruptured – I71.30
  - ruptured – I71.8
  - thoracic – I71.23
    - ruptured – I71.13
- dissecting – see Dissection, aorta
- root – Q25.43
- ruptured – I71.8
- sinus, congenital – Q25.43
- syphilitic – A52.01
- thoracic – I71.20
  - ruptured – I71.10
- thoracoabdominal – I71.60
  - paravisceral – I71.62
    - ruptured – I71.52
  - ruptured – I71.50
  - supraceliac – I71.61
    - ruptured – I71.51
- thorax, thoracic – I71.20
  - arch – I71.22
    - ruptured – I71.12
  - ascending – I71.21
    - ruptured – I71.11
  - descending – I71.23
    - ruptured – I71.13
  - ruptured – I71.10
    - arch – I71.12
    - ascending – I71.11
    - descending – I71.13
- transverse – I71.22
  - ruptured – I71.12
- valve (heart) – I35.8 – see also Endocarditis, aortic
arteriosclerotic – I72.9
- cerebral – I67.1
  - ruptured – see Hemorrhage, intracranial, subarachnoid
arteriovenous (congenital) – see also Malformation, arteriovenous
- acquired – I77.0
  - brain – I67.1
    - ruptured – see Aneurysm, arteriovenous, brain, ruptured
  - coronary – I25.41
  - pulmonary – I28.0
- brain – Q28.2
  - ruptured – I60.8
    - intracerebral – I61.8
    - intraparenchymal – I61.8
    - intraventricular – I61.5
    - subarachnoid – I60.8
- peripheral – see Malformation, arteriovenous, peripheral
- precerebral vessels – Q28.0
- specified site NEC – see also Malformation, arteriovenous
  - acquired – I77.0
basal – see Aneurysm, brain
basilar (trunk) – I72.5
berry (congenital) (nonruptured) – I67.1
- ruptured – I60.7
brain – I67.1
- arteriosclerotic – I67.1
  - ruptured – see Hemorrhage, intracranial, subarachnoid
- arteriovenous (congenital) (nonruptured) – Q28.2
  - acquired – I67.1
    - ruptured – see Aneurysm, arteriovenous, brain, ruptured
  - ruptured – see Aneurysm, arteriovenous, brain, ruptured
- berry (congenital) (nonruptured) – I67.1
  - ruptured – I60.7 – see also Hemorrhage, intracranial, subarachnoid
- congenital – Q28.3
  - ruptured – I60.7
- meninges – I67.1
  - ruptured – I60.8
- miliary (congenital) (nonruptured) – I67.1
  - ruptured – I60.7 – see also Hemorrhage, intracranial, subarachnoid
- mycotic – I67.1
  - with endocarditis – see also Endocarditis
- ruptured – see Hemorrhage, intracranial, subarachnoid
- syphilitic (hemorrhage) – A52.05
cardiac (false) – I25.3 – see also Aneurysm, heart
carotid artery (common) (external) – I72.0
- internal (intracranial) – I67.1
  - extracranial portion – I72.0
- ruptured into brain – I60.0- (header)
- syphilitic – A52.09
  - intracranial – A52.05
cavernous sinus – I67.1
- arteriovenous (congenital) (nonruptured) – Q28.3
  - ruptured – I60.8
celiac – I72.8
central nervous system, syphilitic – A52.05
cerebral – see Aneurysm, brain
chest – see Aneurysm, thorax
circle of Willis – I67.1
- congenital – Q28.3
  - ruptured – I60.6
- ruptured – I60.6
common iliac artery – I72.3
congenital (peripheral) – Q27.8
- aorta (root) (sinus) – Q25.43
- brain – Q28.3
  - ruptured – I60.7
- coronary – Q24.5
- digestive system – Q27.8
- lower limb – Q27.8
- pulmonary – Q25.79
- retina – Q14.1
- specified site NEC – Q27.8
- upper limb – Q27.8
conjunctiva – see Abnormality, conjunctiva, vascular
conus arteriosus – see Aneurysm, heart
coronary (arteriosclerotic) (artery) – I25.41
- arteriovenous, congenital – Q24.5
- congenital – Q24.5
- ruptured – see Infarct, myocardium
- syphilitic – A52.06
- vein – I25.89
cylindroid (aorta) – I71.9
- ruptured – I71.8
- syphilitic – A52.01
ductus arteriosus – Q25.0
endocardial, infective (any valve) – I33.0
femoral (artery) (ruptured) – I72.4
gastroduodenal – I72.8
gastroepiploic – I72.8
heart (wall) (chronic or with a stated duration of over 4 weeks) – I25.3
- valve – see Endocarditis
hepatic – I72.8
iliac (common) (artery) (ruptured) – I72.3
infective – I72.9
- endocardial (any valve) – I33.0
innominate (nonsyphilitic) – I72.8
- syphilitic – A52.09
interauricular septum – see Aneurysm, heart
interventricular septum – see Aneurysm, heart
intrathoracic (nonsyphilitic) – I71.20 – see also Aneurysm, aorta, thorax
- ruptured – I71.10 – see also Aneurysm, aorta, thorax, ruptured
- syphilitic – A52.01
lower limb – I72.4
lung (pulmonary artery) – I28.1
mediastinal (nonsyphilitic) – I72.8
- syphilitic – A52.09
miliary (congenital) – I67.1
- ruptured – see Hemorrhage, intracerebral, subarachnoid, intracranial
mitral (heart) (valve) – I34.89
mural – see Aneurysm, heart
mycotic – I72.9
- endocardial (any valve) – I33.0
- ruptured, brain – see Hemorrhage, intracerebral, subarachnoid
myocardium – see Aneurysm, heart
neck – I72.0
pancreaticoduodenal – I72.8
patent ductus arteriosus – Q25.0
peripheral NEC – I72.8
- congenital – Q27.8
  - digestive system – Q27.8
  - lower limb – Q27.8
  - specified site NEC – Q27.8
  - upper limb – Q27.8
popliteal (artery) (ruptured) – I72.4
precerebral
- congenital (nonruptured) – Q28.1
- specified site, NEC – I72.5
pulmonary – I28.1
- arteriovenous – Q25.72
  - acquired – I28.0
- syphilitic – A52.09
- valve (heart) – see Endocarditis, pulmonary
racemose (peripheral) – I72.9
- congenital – see Aneurysm, congenital
radial – I72.1
Rasmussen NEC – A15.0
renal (artery) – I72.2
retina – see also Disorder, retina, microaneurysms
- congenital – Q14.1
- diabetic – see E08-E13 with .3-
sinus of Valsalva – Q25.43
specified NEC – I72.8
spinal (cord) – I72.8
- syphilitic (hemorrhage) – A52.09
splenic – I72.8
subclavian (artery) (ruptured) – I72.8
- syphilitic – A52.09
superior mesenteric – I72.8
syphilitic (aorta) – A52.01
- central nervous system – A52.05
- congenital (late) – A50.54 – I79.0 [manifestation]
- spine, spinal – A52.09
thoracoabdominal (aorta) – I71.60
- ruptured – I71.50
- syphilitic – A52.01
thorax, thoracic (aorta) (arch) (nonsyphilitic) – see Aneurysm, aorta, thorax
- ruptured – see Aneurysm, aorta, thorax, ruptured
- syphilitic – A52.01
traumatic (complication) (early) – see Injury, blood vessel
tricuspid (heart) (valve) – I07.8
ulnar – I72.1
upper limb (ruptured) – I72.1
valve, valvular – see Endocarditis
venous – I86.8 – see also Varix
- congenital – Q27.8
  - digestive system – Q27.8
  - lower limb – Q27.8
  - specified site NEC – Q27.8
  - upper limb – Q27.8
ventricle – see Aneurysm, heart
vertebral artery – I72.6
visceral NEC – I72.8

How to choose the right code

Start with the main term, then pick the indented subterm that matches the documentation (type, cause, site, laterality, episode of care). Always confirm the code in the tabular list: follow its Excludes1/Excludes2, “code first” and “use additional code” notes, and add a 7th character where required.

Source: CDC/NCHS ICD-10-CM FY2027 alphabetic index.