2026 ICD-10-CM Diagnosis Code I70Atherosclerosis

ICD-10-CM Codes›I00–I99›I70-I79›I70

ICD-10-CM I70
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

I70 is a non-billable ICD-10-CM category code for atherosclerosis, so it cannot be submitted on claims. Use a more specific code from this category instead, such as I70.0, I70.1, I70.201, and I70.202.

Code Identity

ICD-10-CM Code
I70
Billable Status
No — Non-Billable Category
Code Describes
Atherosclerosis
Short Description
Atherosclerosis
Same as the full description in the CMS dataset.
Chapter
I70-I79
Diseases of arteries, arterioles and capillaries

Code Classification

ChapterI00–I99Diseases of the circulatory system
SectionI70-I79Diseases of arteries, arterioles and capillaries
CategoryI70Atherosclerosis
This CodeI70Atherosclerosis

Specific Coding for AtherosclerosisOverview

Non-specific codes like I70 require more characters. Use one of these billable codes instead:

  • Use I70.0 for Atherosclerosis of aorta

  • Use I70.1 for Atherosclerosis of renal artery

  • I70.2 for Atherosclerosis of native arteries of the extremities

  • I70.20 for Unspecified atherosclerosis of native arteries of extremities

  • I70.21 for Atherosclerosis of native arteries of extremities with intermittent claudication

  • I70.22 for Atherosclerosis of native arteries of extremities with rest pain

  • I70.23 for Atherosclerosis of native arteries of right leg with ulceration

  • I70.24 for Atherosclerosis of native arteries of left leg with ulceration

  • Use I70.25 for Atherosclerosis of native arteries of other extremities with ulceration

  • I70.26 for Atherosclerosis of native arteries of extremities with gangrene

  • I70.29 for Other atherosclerosis of native arteries of extremities

  • I70.3 for Atherosclerosis of unspecified type of bypass graft(s) of the extremities

  • I70.30 for Unspecified atherosclerosis of unspecified type of bypass graft(s) of the extremities

  • I70.31 for Atherosclerosis of unspecified type of bypass graft(s) of the extremities with intermittent claudication

  • I70.32 for Atherosclerosis of unspecified type of bypass graft(s) of the extremities with rest pain

  • I70.33 for Atherosclerosis of unspecified type of bypass graft(s) of the right leg with ulceration

  • I70.34 for Atherosclerosis of unspecified type of bypass graft(s) of the left leg with ulceration

  • Use I70.35 for Atherosclerosis of unspecified type of bypass graft(s) of other extremity with ulceration

  • I70.36 for Atherosclerosis of unspecified type of bypass graft(s) of the extremities with gangrene

  • I70.39 for Other atherosclerosis of unspecified type of bypass graft(s) of the extremities

  • I70.4 for Atherosclerosis of autologous vein bypass graft(s) of the extremities

  • I70.40 for Unspecified atherosclerosis of autologous vein bypass graft(s) of the extremities

  • I70.41 for Atherosclerosis of autologous vein bypass graft(s) of the extremities with intermittent claudication

  • I70.42 for Atherosclerosis of autologous vein bypass graft(s) of the extremities with rest pain

  • I70.43 for Atherosclerosis of autologous vein bypass graft(s) of the right leg with ulceration

  • I70.44 for Atherosclerosis of autologous vein bypass graft(s) of the left leg with ulceration

  • Use I70.45 for Atherosclerosis of autologous vein bypass graft(s) of other extremity with ulceration

  • I70.46 for Atherosclerosis of autologous vein bypass graft(s) of the extremities with gangrene

  • I70.49 for Other atherosclerosis of autologous vein bypass graft(s) of the extremities

  • I70.5 for Atherosclerosis of nonautologous biological bypass graft(s) of the extremities

  • I70.50 for Unspecified atherosclerosis of nonautologous biological bypass graft(s) of the extremities

  • I70.51 for Atherosclerosis of nonautologous biological bypass graft(s) of the extremities intermittent claudication

  • I70.52 for Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with rest pain

  • I70.53 for Atherosclerosis of nonautologous biological bypass graft(s) of the right leg with ulceration

  • I70.54 for Atherosclerosis of nonautologous biological bypass graft(s) of the left leg with ulceration

  • Use I70.55 for Atherosclerosis of nonautologous biological bypass graft(s) of other extremity with ulceration

  • I70.56 for Atherosclerosis of nonautologous biological bypass graft(s) of the extremities with gangrene

  • I70.59 for Other atherosclerosis of nonautologous biological bypass graft(s) of the extremities

  • I70.6 for Atherosclerosis of nonbiological bypass graft(s) of the extremities

  • I70.60 for Unspecified atherosclerosis of nonbiological bypass graft(s) of the extremities

  • I70.61 for Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication

  • I70.62 for Atherosclerosis of nonbiological bypass graft(s) of the extremities with rest pain

  • I70.63 for Atherosclerosis of nonbiological bypass graft(s) of the right leg with ulceration

  • I70.64 for Atherosclerosis of nonbiological bypass graft(s) of the left leg with ulceration

  • Use I70.65 for Atherosclerosis of nonbiological bypass graft(s) of other extremity with ulceration

  • I70.66 for Atherosclerosis of nonbiological bypass graft(s) of the extremities with gangrene

  • I70.69 for Other atherosclerosis of nonbiological bypass graft(s) of the extremities

  • I70.7 for Atherosclerosis of other type of bypass graft(s) of the extremities

  • I70.70 for Unspecified atherosclerosis of other type of bypass graft(s) of the extremities

  • I70.71 for Atherosclerosis of other type of bypass graft(s) of the extremities with intermittent claudication

  • I70.72 for Atherosclerosis of other type of bypass graft(s) of the extremities with rest pain

  • I70.73 for Atherosclerosis of other type of bypass graft(s) of the right leg with ulceration

  • I70.74 for Atherosclerosis of other type of bypass graft(s) of the left leg with ulceration

  • Use I70.75 for Atherosclerosis of other type of bypass graft(s) of other extremity with ulceration

  • I70.76 for Atherosclerosis of other type of bypass graft(s) of the extremities with gangrene

  • I70.79 for Other atherosclerosis of other type of bypass graft(s) of the extremities

  • Use I70.8 for Atherosclerosis of other arteries

  • I70.9 for Other and unspecified atherosclerosis

  • Use I70.90 for Unspecified atherosclerosis

  • Use I70.91 for Generalized atherosclerosis

  • Use I70.92 for Chronic total occlusion of artery of the extremities

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • arteriolosclerosis
  • arterial degeneration
  • arteriosclerosis
  • arteriosclerotic vascular disease
  • arteriovascular degeneration
  • atheroma
  • endarteritis deformans or obliterans
  • senile arteritis
  • senile endarteritis
  • vascular degeneration

Use Additional Code

  • 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
  • tobacco use Z72.0

Type 2 Excludes

  • arteriosclerotic cardiovascular disease I25.1
  • arteriosclerotic heart disease I25.1
  • atheroembolism I75
  • cerebral atherosclerosis I67.2
  • coronary atherosclerosis I25.1
  • mesenteric atherosclerosis K55.1
  • precerebral atherosclerosis I67.2
  • primary pulmonary atherosclerosis I27.0

Clinical InformationClinical

  • Atherosclerosis

    a thickening and loss of elasticity of the walls of arteries that occurs with formation of atherosclerotic plaques within the arterial intima.

  • Coronary Artery Disease

    pathological processes of coronary arteries that may derive from a congenital abnormality, atherosclerotic, or non-atherosclerotic cause.

  • Intracranial Arteriosclerosis

    vascular diseases characterized by thickening and hardening of the walls of arteries inside the skull. there are three subtypes: (1) atherosclerosis with fatty deposits in the arterial intima; (2) monckeberg's sclerosis with calcium deposits in the media and (3) arteriolosclerosis involving the small caliber arteries. clinical signs include headache; confusion; transient blindness (amaurosis fugax); speech impairment; and hemiparesis.

Patient EducationClinical

Atherosclerosis

Atherosclerosis is a condition in which plaque builds up inside your arteries. Plaque is a sticky substance made up of cholesterol, fat, blood cells, calcium, and other substances found in the blood. Over time, plaque hardens and causes your arteries to narrow. That limits the flow of oxygen-rich blood to your body.

The full article covers:

  • What is atherosclerosis?
  • What causes atherosclerosis?
  • Who is more likely to develop atherosclerosis?
  • What are the symptoms of atherosclerosis?
  • What other problems can atherosclerosis cause?
  • How is atherosclerosis diagnosed?
  • What are the treatments for atherosclerosis?
  • Can atherosclerosis be prevented?

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About I70Overview

Is I70 (Atherosclerosis) a billable code?

No. This is a category header that groups the codes for atherosclerosis, and headers cannot be submitted on claims. Claims for atherosclerosis need a more specific code from this category, such as I70.0, I70.1, and I70.201.