ICD-10 Code for Atherosclerotic heart disease of native coronary artery without angina pectoris

Coronary artery disease is a chronic condition caused by atherosclerotic plaque buildup in the coronary arteries. Accurate ICD-10 coding for Atherosclerotic heart disease of native coronary artery without angina pectoris matters because it drives clinical clarity, appropriate risk adjustment, compliance with payer policies, and accurate reimbursement. For revenue cycle teams, ambiguous or incorrect coding increases denial risk and can delay payment or trigger audits.

This article explains what the ICD-10 code for Atherosclerotic heart disease of native coronary artery without angina pectoris represents, when to use it, when not to use it, and practical documentation and billing strategies to reduce denials. You will get actionable scenarios, related codes for correct code selection, and compliance-focused best practices tailored for coders, billers, and RCM professionals.

What Is the ICD-10 Code for Atherosclerotic heart disease of native coronary artery without angina pectoris?

The ICD-10-CM Code for Atherosclerotic heart disease of native coronary artery without angina pectoris is I25.10.

Atherosclerotic heart disease of native coronary artery without angina pectoris describes atherosclerotic narrowing or obstruction of one or more native coronary arteries in the absence of documented angina pectoris symptoms. Medically, it indicates chronic ischemic heart disease due to coronary atherosclerosis where the patient does not present with angina chest pain or where angina is not currently documented. Within the ICD-10-CM classification, I25.10 is a category-level code used for stable atherosclerotic coronary disease without acute ischemic symptoms and without specification of prior coronary artery bypass grafting or presence of angina.

When to Use I25.10 Code

Stable coronary atherosclerosis found on imaging without anginal symptoms

Use I25.10 when a patient has documented atherosclerotic plaque on coronary angiography, CT coronary angiogram, or stress imaging, and the clinical record explicitly states there is no angina pectoris. The encounter is for chronic management, surveillance, or risk factor modification with no active ischemic chest pain.

Preoperative evaluation for noncardiac surgery with known coronary atherosclerosis and no angina

Apply I25.10 when the preoperative history documents existing native coronary artery atherosclerosis and there is no current or recent angina. The diagnosis supports perioperative cardiac risk assessment and appropriate workup without implying unstable ischemia.

Longitudinal follow-up for coronary disease management without symptomatic ischemia

Use I25.10 for routine cardiology follow-up visits focused on medication management (statins, antiplatelet therapy, beta-blockers) and risk-factor control when the clinician documents native coronary atherosclerosis without angina. This signals chronic, non-acute ischemic disease.

Post-intervention surveillance when native coronaries are atherosclerotic and angina is absent

If a patient had prior PCI but the documentation refers to disease of the native coronary artery and the current visit notes absence of angina pectoris, I25.10 may be appropriate for visits addressing secondary prevention and surveillance of native-vessel disease.

When Not to Use I25.10 Code

When angina pectoris is documented or unstable ischemia is present

Do not use I25.10 if the clinician documents angina pectoris, unstable angina, or acute coronary syndrome. Instead, select codes that reflect angina (such as a code for angina pectoris) or acute ischemic events to reflect higher acuity and medical necessity for specific interventions.

When coronary artery disease is related to prior coronary artery bypass graft or stent complications

Avoid I25.10 when the condition specifically refers to graft atherosclerosis or complications of prior coronary interventions. Use codes for atherosclerosis of bypass grafts or for conditions related to coronary artery stent restenosis or complications as documented.

When coronary artery disease is secondary to another condition or systemic disorder

Do not use I25.10 when coronary atherosclerosis is described as secondary to an underlying systemic condition that has its own principal code requirement; instead, code the primary condition per sequencing guidance and use the coronary disease code only as a secondary diagnosis when appropriate.

When documentation provides a more specific coronary disease subtype

If the record specifies atherosclerotic heart disease with angina, prior myocardial infarction, or other specified subtypes, choose the more specific ICD-10-CM code that captures angina, old myocardial infarction, or other detailed descriptors rather than I25.10.

Related ICD-10 Codes for coronary artery disease

Condition	Code	When It Is Used	When It Is Not Used
Atherosclerotic heart disease of native coronary artery without angina pectoris	I25.10	Use for chronic native coronary atherosclerosis documented without angina pectoris, for routine management, surveillance, and non-acute risk assessment	Do not use when angina, acute ischemia, graft disease, or a more specific coronary diagnosis is documented
Atherosclerotic heart disease of native coronary artery with angina pectoris	I25.110	Use when clinician documents native coronary atherosclerosis with stable or unstable angina pectoris as the clinical focus of the encounter	Do not use when angina is absent or when an acute MI or other specified ischemic event is coded
Atherosclerotic heart disease of bypass graft	I25.810	Use when atherosclerosis specifically involves a coronary artery bypass graft and the visit pertains to graft disease management	Do not use for disease limited to native coronary arteries without graft involvement
Atherosclerotic heart disease of native coronary artery with unspecified status	I25.9	Use when atherosclerotic heart disease is documented but insufficient detail exists to determine presence of angina or specific subtype	Do not use when documentation allows selection of a more specific code (e.g., I25.10 or I25.110)

Best Practices for Getting Reimbursed When Using Atherosclerotic heart disease of native coronary artery without angina pectoris ICD-10 Codes

Document explicit symptom status and chronicity

Ensure the chart explicitly states presence or absence of angina and the chronic nature of disease. Documentation that separates “no angina” versus “no chest pain today” prevents miscoding and supports use of I25.10.

Tie diagnosis to medical necessity and plan of care

Link the diagnosis to specific services (medication management, cardiology follow-up, imaging surveillance) in the note. Demonstrating medical necessity reduces denials and improves claim defensibility.

Capture prior interventions and status of native coronaries

Document prior PCI or CABG and specify whether the current diagnosis refers to native coronary arteries or grafts. Accurate site-of-disease language prevents inappropriate use of graft-specific codes.

Use problem lists and encounter diagnoses consistently

Ensure problem lists, encounter diagnosis fields, and discharge summaries use the same terminology for coronary artery disease. Consistency across records reduces query needs and coding errors.

Employ clinical queries when documentation is ambiguous

When records do not clearly indicate angina status or whether disease involves grafts, use a concise, compliant clinical query to obtain clarification prior to coding. Proper querying protects against undercoding or upcoding.

Billing and Reimbursement Considerations

Coding for coronary artery disease has direct impact on revenue cycle outcomes:

Reimbursement Impact

• Accurate coding of coronary artery disease affects claim acceptance by reflecting true acuity and service necessity.
• Common denial reasons when I25.10 is used incorrectly include lack of documentation supporting absence of angina, mismatch between diagnosis and billed services, and use when a more specific ischemic code is required.
• Medical necessity requirements often require linkage between the diagnosis and services billed (e.g., imaging, stress testing, cardiology procedures).
• Payer-specific guidelines may require additional documentation or prior authorization for cardiology procedures in patients with chronic coronary disease.

Compliance Considerations

• Audit risk areas include inconsistent documentation of angina status, failure to specify native artery versus graft involvement, and improper sequencing when acute ischemia is present.
• Documentation standards require clarity on disease chronicity, symptoms, prior interventions, and rationale for tests or procedures.
• Upcoding and undercoding risks arise when a less specific code like I25.10 is used despite available documentation supporting a more acute or specific diagnosis.
• Follow CMS guidance and major payer policies for sequencing, principal vs secondary diagnosis rules, and use of specific ischemic heart disease codes to maintain compliance.

Accurate ICD-10 coding is critical for healthcare revenue cycle performance. CombineHealth.ai's AI-powered platform helps RCM teams ensure coding accuracy, reduce denials, and optimize reimbursement through intelligent denial management and claim validation. CombineHealth.ai's intelligent platform provides automated claim scrubbing and coding validation to catch errors before submission, reducing denials and improving first-pass acceptance rates.

FAQs

Q1: What is the ICD-10 code for coronary artery disease?
The ICD-10-CM code for coronary artery disease of the specific type Atherosclerotic heart disease of native coronary artery without angina pectoris is I25.10. Use this code when documentation clearly indicates native coronary atherosclerosis without anginal symptoms and the visit is for chronic management or surveillance.

Q2: When should I use I25.10 vs related codes?
Use I25.10 when documentation indicates atherosclerosis of native coronary arteries and explicitly states no angina. Use the code for angina when chest pain consistent with angina is documented. Choose graft-specific or post-procedure disease codes when documentation involves bypass grafts or complications of stents/PCI.

Q3: What documentation is required when coding for coronary artery disease?
Document disease location (native artery vs graft), presence or absence of angina, chronicity, prior interventions (PCI, CABG), and the clinical rationale for ordered tests or treatments. Ensure encounter diagnoses, problem lists, and procedure indications align.

Q4: What are common denial reasons when coding for coronary artery disease?
Common denials include insufficient documentation to support the coded diagnosis, mismatch between diagnosis and billed services, failure to use a more specific ischemic code when indicated, and lack of linkage demonstrating medical necessity. See our guide on denial management for strategies to reduce these denials.