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I25.1 vs I70.613

I25.1 (Atherosclerotic heart disease of native coronary artery) compared with I70.613 (Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication, bilateral legs), from the official CMS tabular data.

Current data releases:ICD-10-CM FY2027 · ICD-10-PCS FY2027 · HCPCS October 2026 · MS-DRG v44 · Medicare Code Editor v44.0 · NCCI PTP Q4 2026 · MUE Q4 2026 · NCD code lists 2026-01 · LCD export September 28, 2026 · All releases and sources

Summary

These codes can be reported together when both conditions are documented, because I70.613 lists I25.1 under Excludes2, which marks them as distinct conditions.

Official rule
What is different?

The conditions named and billing status.I25.1 is “Atherosclerotic heart disease of native coronary artery”; I70.613 is “Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication, bilateral legs”. I25.1 is a non-billable header; I70.613 is billable.

Registry fact

Can these codes be reported together?

Yes, when both are documented.I70.613 lists I25.1 under Excludes2: “arteriosclerotic cardiovascular disease (I25.1-)”. Excludes2 marks distinct conditions that may both be reported when both are documented.

Official ruleGuide: Excludes1 vs Excludes2

Is there an Excludes2 relationship?

Yes.I70.613’s tabular entry: “arteriosclerotic cardiovascular disease (I25.1-)”. The note covers I25.1.

Official ruleGuide: Excludes1 vs Excludes2

Is one a parent or header code?

One is a header.I25.1 is a non-billable header, but I70.613 is not one of its subdivisions.

Registry fact

Nothing found in 3 other checks; 1 check does not apply
Is there an Excludes1 relationship?

None.Neither entry carries an Excludes1 note that names the other code.

Official rule

Is one more specific?

Not comparable.The codes sit in different categories; specificity is only comparable within one category.

Are there sequencing instructions?

None.Neither entry carries a Code First or Use Additional Code note that names the other.

Official rule

Are there other coding relationships?

None found.No laterality, encounter-phase, Table of Neoplasms, Table of Drugs and Chemicals, or history-versus-active-disease relationship links these codes.

MedCoder-derived

Official rule: a tabular instructional note or a section of the ICD-10-CM Official Guidelines, quoted as published. Registry fact: the codes’ own published attributes (titles, billable status, position in the hierarchy, code set). MedCoder-derived: a reading MedCoder computes from those facts; it is not itself a rule. How to read the labels

Can these codes be reported together?

Informational

Excludes2 relationship

I70.613
Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication, bilateral legs
↔
I25.1
Atherosclerotic heart disease of native coronary artery

What we found

Yes, when both are documented.I70.613 carries an Excludes2 note covering I25.1: “arteriosclerotic cardiovascular disease (I25.1-)”

Excludes2 marks distinct conditions — both may be reported when both are documented.

What to review

Report both only when the documentation supports both conditions; otherwise report the one documented.

Guide: Excludes1 vs Excludes2Check these on a claim

Why it matters

An Excludes2 note means the excluded condition is not part of the code above it, but a patient can have both. Report both when both are documented.

Source / rule

CMS ICD-10-CM tabular instructional notes

Official guidance behind these answers

  • Section I.A.12.b — Excludes2 · applies to: Excludes2

    A type 2 Excludes note represents “Not included here.” An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.

    ICD-10-CM Official Guidelines FY2027

Quoted from the ICD-10-CM Official Guidelines for Coding and Reporting in effect for the release shown. The tabular notes above are the code-level instruction; these sections are the convention that says how such a note is applied. Source document (CMS PDF) · Release and checksum

Side by side

Similar descriptions do not make codes interchangeable. The documentation and the official instructions decide which code applies.

Official descriptionDiffers
I25.1

Atherosclerotic heart disease of native coronary artery

I70.613

Atherosclerosis of nonbiological bypass graft(s) of the extremities with intermittent claudication, bilateral legs

StatusDiffers
I25.1
Non-billable header

A header is not reported on a claim; a code beneath it is.

Report instead: I25.10, I25.110, I25.111, I25.112, I25.118

I70.613
Billable
Excludes2Differs
Only at I25.1
  • atherosclerosis of coronary artery bypass graft(s) and transplanted heart (I25.7-)
  • non-ischemic myocardial injury (I5A)
Only at I70.613
  • arteriosclerotic cardiovascular disease (I25.1-)
  • arteriosclerotic heart disease (I25.1-)
  • cerebral atherosclerosis (I67.2)
  • coronary atherosclerosis (I25.1-)
  • mesenteric atherosclerosis (K55.1)
  • precerebral atherosclerosis (I67.2)
  • primary pulmonary atherosclerosis (I27.0)
Shared by both codes (1 note)
  • atheroembolism (I75.-)
Use additional codeDiffers
Only at I25.1
  • code, if applicable, to identify:
  • coronary atherosclerosis due to calcified coronary lesion (I25.84)
  • coronary atherosclerosis due to lipid rich plaque (I25.83)
  • chronic total occlusion of coronary artery (I25.82)
Only at I70.613
  • code, if applicable, to identify chronic total occlusion of artery of extremity (I70.92)
Shared by both codes (6 notes)
  • 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)
Code alsoDiffers
I25.1
  • the presence of hypertension (I10-I1A)
I70.613

None at this code

CategoryDiffers
I25.1

I25 Chronic ischemic heart disease

I70.613

I70 Atherosclerosis

ChapterSame for both

I00-I99 — Diseases of the Circulatory System (I00-I99)

IncludesDiffers
I25.1
  • Atherosclerotic cardiovascular disease
  • Coronary (artery) atheroma
  • Coronary (artery) atherosclerosis
  • Coronary (artery) disease
  • Coronary (artery) sclerosis
I70.613
  • arteriolosclerosis
  • arterial degeneration
  • arteriosclerosis
  • arteriosclerotic vascular disease
  • arteriovascular degeneration
  • atheroma
  • endarteritis deformans or obliterans
  • senile arteritis
  • senile endarteritis
  • vascular degeneration

No Excludes1, Code first and 7th character note at either code.

Notes are the code’s own tabular entry, quoted as published. A note that names the other code is the one the verdict above rests on. In a row that differs, each code’s own notes are listed under it, and the notes every code shares are listed once beneath them.

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Derived from the official CMS ICD-10-CM tabular data (FY2027). A coding-rule comparison, not billing advice: payer-specific edits and medical-necessity policy are outside its scope. All data sources