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I25.1 ICD-10-CM Code: Atherosclerotic heart disease of native coronary artery

Compare with another code for I25.1Check this code on a claim

Billing Status: NO. This is a non-billable ICD-10-CM code: report a more specific billable code beneath it.

Coding at a Glance

Tabular directives
5 inclusion terms · 3 Excludes2 · 10 use-additional codes · 1 code-also instruction

Not billable · FY2027A non-billable heading in the tabular list: report a more specific code beneath it.

What you need to know

Source: CMS/NCHS Official ICD-10-CM tabular notes, quoted. From the CMS/NCHS tabular list for the release in force. A note the category or block publishes applies to this code too, and is marked with where it comes from.

Use additional codeReport with this code when documented
  • Use additional code, if applicable, to identify:
  • coronary atherosclerosis due to calcified coronary lesion (I25.84)
  • coronary atherosclerosis due to lipid rich plaque (I25.83)
  • Use additional code to identify: (from I25)

+6 more in Instructions

Code alsofrom I20-I25May be needed with this code
  • the presence of hypertension (I10-I1A)
Excludes2Not included here; may be reported together
  • atheroembolism (I75.-)
  • atherosclerosis of coronary artery bypass graft(s) and transplanted heart (I25.7-)
  • non-ischemic myocardial injury (I5A) (from I25)
IncludesWhat this code covers
  • Atherosclerotic cardiovascular disease
  • Coronary (artery) atheroma
  • Coronary (artery) atherosclerosis
  • Coronary (artery) disease

+1 more in Instructions

Where it sits Source: CMS/NCHS

Under:Chapter 9: Diseases of the Circulatory SystemI20-I25 Ischemic heart diseasesI25 Chronic ischemic heart disease

Codes under I25.1 (2)

  • I25.10Atherosclerotic heart disease of native coronary artery without angina pectorisBillable
  • I25.11Atherosclerotic heart disease of native coronary artery with angina pectorisNot billable

Most relevant related codes MedCoder-derived

Read off the official notes above and this code’s own position in the tabular list. Which to report is a documentation question; Compare shows the two side by side.

CompareCheck ClaimView Related Codes

Coding instructions

Official Tabular Instructional Notes: the inclusion, exclusion and sequencing notes published for I25.1 in the official ICD-10-CM tabular list, quoted as published.

Source: CMS/CDC — ICD-10-CM Tabular ListRelease: FY2027Effective: October 1, 2026

Trace:FY2027 changesChange historyRelease, file and checksum

Notes without a marker are published on I25.1 itself; “inherited from” names the category or block whose note applies here.

Inclusion Terms

Alternative terms the tabular list files under this code.

  • Atherosclerotic cardiovascular disease
  • Coronary (artery) atheroma
  • Coronary (artery) atherosclerosis
  • Coronary (artery) disease
  • Coronary (artery) sclerosis

Excludes2 — Not Included Here

Conditions not covered by this code, but which may be reported alongside it when both are present.

Code Also

Additional codes that may be required to fully describe the encounter.

  • the presence of hypertension (I10-I1A)

Source: inherited from I20-I25

Use Additional Code

Supplementary codes the tabular list directs you to add.

  • Use additional code, if applicable, to identify:
  • coronary atherosclerosis due to calcified coronary lesion (I25.84)
  • coronary atherosclerosis due to lipid rich plaque (I25.83)
  • Use additional code to identify:
  • chronic total occlusion of coronary artery (I25.82) inherited from I25
  • exposure to environmental tobacco smoke (Z77.22) inherited from I25
  • history of tobacco dependence (Z87.891) inherited from I25
  • occupational exposure to environmental tobacco smoke (Z57.31) inherited from I25
  • tobacco dependence (F17.-) inherited from I25
  • tobacco use (Z72.0) inherited from I25

Coder workflow for I25.1

MedCoder structured workflow — derived from this code’s own official record

Before you code I25.1

  1. I25.1 is not reportable as written. Select the more specific code beneath it that the documentation supports. Codes are reported to the highest level of specificity the classification provides (Guidelines I.B.2).

    ReviewI25.10, I25.11

    See the relationships section · Guide: How to choose an ICD-10-CM code →

Choose the right path

  1. Does the documentation support one of the more specific codes beneath I25.1?
    Yes → Select that code and continue the checks below on its own page.
    No → I25.1 cannot be reported as written. Where the codes beneath it include an unspecified code, that code applies when the record goes no further; otherwise query for the missing detail.

    ReviewI25.10, I25.11

Report the code beneath I25.1 that the documentation supports, not I25.1 itself. Then work the Use Additional Code note and review the Code Also note, and confirm that code is valid for the date of service on its own page.

Documentation check

The provider’s diagnostic statement
Codes are assigned from the provider’s documented diagnosis, not from clinical criteria, test values or a medication list (Guidelines I.A.19).
The conditions the Use Additional Code note names
Reported with this code when documented; a conditional instruction (“if applicable”, “if known”) applies only when the record supports it.

Official instructions as workflow

  • Excludes2 — not part of I25.1(3 notes)

    Coding workflow: The conditions named in this note are not included in I25.1. When the record documents both, both may be reported; the note is a boundary, not a prohibition.

    CompareI75, I25.7, I5A

    See the official tabular notes · Guidelines I.A.12.b

  • Use Additional Code — after identifying I25.1(10 notes)

    Coding workflow: Check whether the documentation supports the additional code(s) the note names, and report them with I25.1 when it does. Where the instruction is conditional (“if applicable”, “if known”), it applies only when the record documents the condition.

    ReviewI25.84, I25.83, I25.82, Z77.22, Z87.891, Z57.31

    See the official tabular notes · Guidelines I.A.13

  • Code Also — related condition(1 note)

    Coding workflow: Review the related condition when both are documented and the instruction applies. A Code Also note does not fix sequencing; the order follows the circumstances of the encounter.

    See the official tabular notes · Guidelines I.A.17

Coding decision scenarios

Pattern scenarios for this code’s structure — decision rules, not clinical cases

Documentation: A condition the Use Additional Code note names is documented.

Coding question: Is a second code reported with the code beneath I25.1?

Path: Review the Use Additional Code note and the code it names.

Reason: The additional code is reported when the record documents the condition; a conditional instruction applies only when its condition is met (Guidelines I.A.13).

ReviewI25.84, I25.83, I25.82, Z77.22, Z87.891, Z57.31

Every row is derived from this code’s own record — its title, tabular notes, 7th-character family and same-category siblings — with fixed MedCoder wording; nothing is inferred about a patient. The official notes and guideline text are in the sections each row links to, and they control.

Don’t confuse I25.1 with…

MedCoder analysis — pairs from this code’s official notes, distinctions written by MedCoder

The codes most likely to be picked instead of I25.1 — named in its own official notes, or sharing its laterality or encounter family — with what separates them and which documentation moves the case. Each links to the full comparison.

  • I75— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of atheroembolism adds I75; it is not part of this code and both may be reported when both are documented.

    Full comparison: I25.1 vs I75 →

  • I25.7— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of atherosclerosis of coronary artery bypass graft(s) and transplanted heart adds I25.7; it is not part of this code and both may be reported when both are documented.

    Full comparison: I25.1 vs I25.7 →

  • I5A— Excludes2 relationship (Informational)

    Distinct conditions — both may be reported.

    A distinct condition — both may be reported when both are documented.

    What moves you there: Documentation of non-ischemic myocardial injury adds I5A; it is not part of this code and both may be reported when both are documented.

    Full comparison: I25.1 vs I5A →

Relationships are read from this code's own official notes, its laterality siblings and its encounter family; the wording of each distinction is MedCoder editorial, and the documentation named in each “what moves you there” line is the official note phrase or sibling title itself. Source: CMS ICD-10-CM tabular instructional notes; ICD-10-CM Official Guidelines, Section I.A.12.a.

Coding context

Guidelines, coding notes, decision aids, relationships (with MS-DRG and CCSR classification), hierarchy, HCC, coverage and the context map: what a coder reaches for after the core. Each section names whether it is official source data, a MedCoder-derived relationship or MedCoder editorial.

Code Overview

Atherosclerotic heart disease of native coronary artery is a non-billable ICD-10-CM category code (I25.1). A more specific billable subcode must be selected for claims submission.

MedCoder summary Summary composed by MedCoder from this code's official ICD-10-CM record. The tabular instructional notes themselves appear verbatim below.

Decision Points

The directives on this code's own record, as a pre-claim checklist.

  1. 10 Use Additional Code instructions — report the named additional code(s) when the documentation supports them. See the Use Additional Code notes
  2. 1 Code Also note — a second code may apply; the guidelines leave its sequencing to the circumstances of the encounter. See the Code Also notes
  3. 3 Excludes2 entries — those conditions are not part of this code and may be reported additionally when documented. See the Excludes2 notes

Checklist rows are derived from this code's own official directives; the wording of each check is MedCoder editorial. The official notes themselves are in the sections each row links to.

Verify Before Coding

From the code registry, the Medicare Code Editor, and the MS-DRG Definitions Manual. Check it against a full claim in Claim Check.

Relationships & Classification

MedCoder-derived relationships — computed from published CMS and AHRQ datasets

Other codes that name I25.1 or its code family, from the CMS ICD-10-CM tabular instructional notes. Tabular-note edges are stored at the code family level that carries each note.

Referenced by 2 Excludes1 notes: I20 — Angina pectoris, I24.0 — Acute coronary thrombosis not resulting in myocardial infarction.

These codes’ tabular lists mark this diagnosis as mutually exclusive — not reported together unless the conditions are documented as unrelated.

Referenced by 4 Excludes2 notes: I25.5 — Ischemic cardiomyopathy, I70 — Atherosclerosis, I74 — Arterial embolism and thrombosis (via I25.-), I82 — Other venous embolism and thrombosis (via I25.-).

These codes’ tabular lists name this diagnosis as distinct — both may be reported when both are documented.

Referenced by 3 Code First instructions: I25.82 — Chronic total occlusion of coronary artery, I25.83 — Coronary atherosclerosis due to lipid rich plaque, I25.84 — Coronary atherosclerosis due to calcified coronary lesion.

Each of these codes carries a Code First note naming this condition — when that code is reported, THIS code is sequenced first, ahead of it.

Contextual Map

Every relationship of I25.1 in one view: hierarchy, official tabular instructions in both directions, clinical classification, risk adjustment, MS-DRG participation, index terms and change history — each edge carrying the CMS source it derives from.

Run I25.1 with these 11 related codes in Claim Check

Hierarchy

Excludes2

Use Additional Code

Referenced by Excludes1 notes

Referenced by Excludes2 notes

Referenced by Code First instructions

Nearest codes (40)

Change history

  • FY2016 — In the code set at ICD-10-CM adoption [Change history]— CMS release files (code change ledger) · icd10cm-fy2016

Reference

Index terms and tables, published questions and FAQ, every source behind this page with its release and checksum, the date-of-service check and the complete change history.

Common coding questions

MedCoder editorial

Can I25.1 be billed directly?

No. I25.1 (Atherosclerotic heart disease of native coronary artery) is a non-billable ICD-10-CM category code. A more specific billable subcode must be selected based on clinical documentation.

Sources for this page

Codes, titles, notes, index terms and mappings on this page are transcribed from the datasets below. Relationships MedCoder computed and text MedCoder wrote are labelled where they appear.

Code, title, tabular notes and index terms Official source data
CMS/CDC ICD-10-CM FY2027 tabular list, index and tables, effective October 1, 2026 Release, file and checksum · Publisher’s page
Claim edits Official source data
CMS Definitions of Medicare Code Edits — v44.0 (October 2026) Release, file and checksum · Publisher’s page
Change history and date-of-service validity Official source data
CMS ICD-10-CM release addenda, ingested release by release into the change ledger Release, file and checksum · Publisher’s page
Comparisons, relationships and the contextual map MedCoder-derived relationship
Computed by MedCoder from the tabular notes and tables above; every derived relationship is marked as derived where it appears
Summary and FAQ answers MedCoder editorial explanation
Written by MedCoder to explain the sources above: drafted with AI assistance, checked by a person against the release files, and labelled as MedCoder text where it appears. Not official text.

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

Labels on this page: Official source data · MedCoder-derived relationship · MedCoder editorial explanation. How to read the labels · All data sources and release dates · CMS coding rules

Cite this page

Reference this page in a research guide, syllabus or article. The release is included because code content changes each year.

MedCoder.ai. "I25.1 — Atherosclerotic heart disease of native coronary artery." ICD-10-CM FY2027. https://medcoder.ai/icd10/code/i25.1-atherosclerotic-heart-disease-of-native-coronary-artery

Change history

  • FY2016 — October 1, 2015
    In the code set at ICD-10-CM adoption
    Atherosclerotic heart disease of native coronary artery

No changes since FY2016 — additions, deletions, description changes and billable-status changes are tracked through FY2027, and none are recorded for this code. Note changes are tracked from FY2027 only.

Nearest Codes in This Family

Official ICD-10-CM classifications closest to I25.1 in its code family, with their registry titles.

View all codes in the I25 family