2027 ICD-10-CM Diagnosis Code I70Atherosclerosis

ICD-10-CM Codes›I00–I99›I70-I79›I70

ICD-10-CM I70
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to I70: its own notes plus those printed at Chapter 9. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

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

Excludes2

Not included here: the excluded condition is not part of this code, but a patient may have both, so both codes may be reported.

On I70 itself
  • 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)
From Chapter 9 (I00-I99) Diseases of the circulatory system applies to 1,433 codes
  • certain conditions originating in the perinatal period (P04-P96)
  • certain infectious and parasitic diseases (A00-B99)
  • complications of pregnancy, childbirth and the puerperium (O00-O9A)
  • congenital malformations, deformations, and chromosomal abnormalities (Q00-Q99)
  • endocrine, nutritional and metabolic diseases (E00-E88)
  • injury, poisoning and certain other consequences of external causes (S00-T88)
  • neoplasms (C00-D49)
  • symptoms, signs and abnormal clinical and laboratory findings, not elsewhere classified (R00-R94)
  • systemic connective tissue disorders (M30-M36)
  • transient cerebral ischemic attacks and related syndromes (G45.-)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • 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)

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name I70, its category, or a range that includes it.

Excludes1 3

These codes carry an Excludes1 note naming I70: they are not reported together with it, unless the two conditions are unrelated.

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.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About I70Overview

What is the ICD-10 code for atherosclerosis?

I70 is the ICD-10-CM category for atherosclerosis, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Does I70 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: 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). The additional code is reported after I70.