ICD-10 Code for Atheroma
The ICD-10-CM code for atheroma is I70.90 — Unspecified atherosclerosis. This is the code the Alphabetic Index gives for atheroma with no further qualifier, valid for FY2027 (October 1, 2026 – September 30, 2027).
I70.90 is billable but unspecified. If the documentation names a type, site or cause, one of the more specific codes below is likely expected.
Which atheroma code should you use?
The Alphabetic Index lists 8 codes under Atheroma, atheromatous. Which one applies depends on the qualifier documented in the record — the type, site, cause, or associated condition. Find the qualifier below, then verify the code in the Tabular List before using it.
By type
| aorta, aortic | I70.0 | Atherosclerosis of aorta | |
| aorto-iliac | I70.0 | Atherosclerosis of aorta | |
| basilar | I67.2 | Cerebral atherosclerosis | |
| carotid | I67.2 | Cerebral atherosclerosis | |
| cerebral | I67.2 | Cerebral atherosclerosis | |
| coronary | I25.10 | Atherosclerotic heart disease of native coronary artery without angina pectoris | |
| mitral | I34.89 | Other nonrheumatic mitral valve disorders | |
| pulmonary valve | I37.8 | Other nonrheumatic pulmonary valve disorders | |
| tricuspid | I36.8 | Other nonrheumatic tricuspid valve disorders | |
| vertebral | I67.2 | Cerebral atherosclerosis |
Atheroma aorta, aortic
| valve | I35.8 | Other nonrheumatic aortic valve disorders |
Index terms and codes are reproduced from the official ICD-10-CM FY2027 release. The Alphabetic Index is a finding aid — a code must always be verified in the Tabular List before it is reported. Data sources