ICD-10-CM 2027
ICD-10 code for coronary artery arteritis
From the official ICD-10-CM alphabetic index entry “Arteritis › coronary (artery)”. Page updated September 29, 2026.
About coding coronary artery arteritis
The ICD-10-CM code for coronary artery arteritis is I25.89 (Other forms of chronic ischemic heart disease). The official index lists 3 more specific codes, so check the documentation for details such as type, cause, site or severity before settling on I25.89.
Within I25.8, choose I25.89 (Other forms of chronic ischemic heart disease) only when documentation doesn't support a more specific option: atherosclerosis of other coronary vessels without angina pectoris (I25.81), chronic total occlusion of coronary artery (I25.82), coronary atherosclerosis due to lipid rich plaque (I25.83), coronary atherosclerosis due to calcified coronary lesion (I25.84) and chronic coronary microvascular dysfunction (I25.85).
Use an additional code to identify: chronic total occlusion of coronary artery (I25.82), 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 1 more.
It is not a CC or MCC, so as a secondary diagnosis it doesn't change the MS-DRG severity level.
More specific coronary artery arteritis codes (official index)
Common questions about coronary artery arteritis ICD-10 codes
What is the ICD-10 code for coronary artery arteritis?
- I25.89 — Other forms of chronic ischemic heart disease. More specific codes apply when the documentation supports them: I01.8, I09.89, A52.06.
What is the ICD-10 code for rheumatic coronary artery arteritis?
- I01.8 — Other acute rheumatic heart disease.
What is the ICD-10 code for syphilitic coronary artery arteritis?
- A52.06 — Other syphilitic heart involvement.
Is I25.89 billable?
- Yes. I25.89 is a billable/specific ICD-10-CM code valid for FY2027 (October 1, 2026 – September 30, 2027).
Can I25.89 be used as a principal diagnosis?
- Yes. The Medicare Code Editor doesn't restrict I25.89 as a principal diagnosis.
Is I25.89 a CC or MCC?
- No. I25.89 is neither a CC nor an MCC under MS-DRG v44.0.