ICD-10-CM 2027
ICD-10 code for Atheroma
From the official ICD-10-CM alphabetic index entry “Atheroma, atheromatous”. Page updated September 29, 2026.
About coding Atheroma
The ICD-10-CM code for Atheroma is I70.90 (Unspecified atherosclerosis). The official index lists 11 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I70.90.
Within I70.9, choose I70.90 (Unspecified atherosclerosis) only when documentation doesn't support a more specific option: generalized atherosclerosis (I70.91) and chronic total occlusion of artery of the extremities (I70.92).
Use an additional code to identify: exposure to environmental tobacco smoke (Z77.22), history of tobacco dependence (Z87.891), occupational exposure to environmental tobacco smoke (Z57.31), tobacco dependence (F17.-) and tobacco use (Z72.0).
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific Atheroma codes (official index)
- aorta, aortic I70.0 — Atherosclerosis of aorta
- valve I35.8 — Other nonrheumatic aortic valve disorders
- aorto-iliac I70.0 — Atherosclerosis of aorta
- artery
- basilar (artery) I67.2 — Cerebral atherosclerosis
- carotid (artery) (common) (internal) I67.2 — Cerebral atherosclerosis
- cerebral (arteries) I67.2 — Cerebral atherosclerosis
- coronary (artery) I25.10 — Atherosclerotic heart disease of native coronary artery without angina pectoris
- with angina pectoris
- degeneration
- heart, cardiac
- mitral (valve) I34.89 — Other nonrheumatic mitral valve disorders
- myocardium, myocardial
- pulmonary valve (heart) I37.8 — Other nonrheumatic pulmonary valve disorders
- tricuspid (heart) (valve) I36.8 — Other nonrheumatic tricuspid valve disorders
- valve, valvular
- vertebral (artery) I67.2 — Cerebral atherosclerosis
Common questions about Atheroma ICD-10 codes
What is the ICD-10 code for Atheroma?
- I70.90 — Unspecified atherosclerosis. More specific codes apply when the documentation supports them: I70.0, I35.8, I70.0, I67.2 and others below.
What is the ICD-10 code for aorto-iliac atheroma?
- I70.0 — Atherosclerosis of aorta.
What is the ICD-10 code for basilar atheroma?
- I67.2 — Cerebral atherosclerosis.
What is the ICD-10 code for carotid atheroma?
- I67.2 — Cerebral atherosclerosis.
What is the ICD-10 code for cerebral atheroma?
- I67.2 — Cerebral atherosclerosis.
What is the ICD-10 code for coronary atheroma?
- I25.10 — Atherosclerotic heart disease of native coronary artery without angina pectoris.
What is the ICD-10 code for mitral atheroma?
- I34.89 — Other nonrheumatic mitral valve disorders.
Is I70.90 billable?
- Yes. I70.90 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I70.90 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I70.90 as a principal diagnosis.
Is I70.90 a CC or MCC?
- No. I70.90 is neither a CC nor an MCC under MS-DRG v44.0.