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v1.0.0
ICD-10 Guide
DiagnosesAtherosclerosis Heart Disease

Atherosclerosis Heart Disease

ICD-10 Coding for Atherosclerosis Heart Disease(I25.10, I25.118)

PRIMARY SPECIALTYCardiology
COMPLEXITYHigh
LAST UPDATED09/15/2025
Sam Tuffun, PT, DPT
Physical Therapist | Medical Coding & Billing Contributor

Diagnosis Overview

What is Atherosclerosis Heart Disease?
Essential facts and insights about Atherosclerosis Heart Disease

Key Clinical Considerations:

  • Patients may present with chest pain, shortness of breath, fatigue, or heart palpitations.
  • Laboratory findings may include elevated cholesterol levels, particularly low-density lipoprotein (LDL) and triglycerides.
  • Physical examination may reveal signs of heart failure, such as edema, elevated jugular venous pressure, or abnormal heart sounds.
  • Imaging findings may include coronary artery calcification on CT scans or evidence of ischemia on stress tests.
  • Severity can be assessed based on the extent of coronary artery involvement and the presence of symptoms during physical activity.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the patient's symptoms, risk factors (e.g., hypertension, diabetes), and any relevant family history.
  • Specific terminology such as 'atherosclerotic heart disease' or 'coronary artery disease' must be used to ensure clarity.
  • Examples include documenting the patient's angina episodes, results of stress tests, and any interventions performed.
  • Medical necessity must be established through documentation of symptoms and the need for diagnostic testing or treatment.
  • Quality measures may include documentation of lipid levels, blood pressure readings, and adherence to treatment protocols.

Coding Guidelines

Usage Guidelines & Examples

  • Use I25.10 for atherosclerotic heart disease without angina; use I25.118 for atherosclerotic heart disease with angina.
  • Do not use these codes for non-atherosclerotic heart diseases such as hypertensive heart disease or valvular heart disease.
  • I25.9 is a related code for unspecified atherosclerotic heart disease, but it lacks specificity.
  • Common errors include using the unspecified code when the condition is documented as atherosclerotic heart disease.
  • In complex cases, ensure that the documentation supports the specific type of atherosclerosis being coded.

Code Exclusions

Important Exclusions

  • Excludes conditions such as acute coronary syndrome (I21) and other forms of heart disease not related to atherosclerosis.
  • Alternative codes for excluded conditions include I20 for angina pectoris and I25.9 for unspecified atherosclerotic heart disease.
  • Conditions are excluded because they represent different pathophysiological processes or acute events.
  • Common mistakes include misclassifying acute coronary syndromes as chronic atherosclerotic disease.
  • Related but distinct conditions include myocardial ischemia and coronary artery spasm.

Related ICD-10 Codes

Primary Codes
I25.10
Atherosclerotic heart disease, unspecified
I25.118
Atherosclerotic heart disease with angina pectoris
Ancillary Codes
Z77.22
E78.00
Differential Codes
I25.11-
I20.0

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • This diagnosis applies to patients with coronary artery disease due to atherosclerosis.
  • Patient populations include adults, particularly those over 45 years old, with risk factors such as obesity, smoking, and family history.
  • Clinical settings include outpatient cardiology clinics, inpatient hospital settings, and emergency departments.
  • Specialty-specific applications are relevant in cardiology, internal medicine, and preventive medicine.
  • Treatment contexts include management of chronic stable angina and post-myocardial infarction care.

Coding Complexity

High Complexity

This diagnosis requires careful attention to:

  • Comprehensive clinical documentation
  • Accurate code selection based on clinical criteria
  • Proper exclusion considerations
  • Specialty-specific coding guidelines

Documentation

Documentation Templates

Template 1

Template: 'Patient diagnosed with atherosclerotic heart disease based on clinical findings of chest pain and elevated LDL levels.'

Template 2

Template: 'Clinical presentation consistent with atherosclerotic heart disease including exertional angina and fatigue.'

Template 3

Template: 'Diagnostic criteria for atherosclerosis met as evidenced by coronary angiography showing significant stenosis.'

Template 4

Template: 'Treatment plan initiated for atherosclerotic heart disease with lifestyle modifications and statin therapy.'

Template 5

Template: 'Follow-up care for atherosclerotic heart disease including monitoring of blood pressure and lipid levels.'

Billing Information

Billing Considerations

  • Ensure proper documentation for billing
  • Verify code specificity requirements
  • Check for any additional codes needed
  • Review payer-specific guidelines

Common Issues

  • Insufficient clinical documentation
  • Incorrect code selection
  • Missing supporting diagnoses
  • Timing and frequency documentation

Frequently Asked Questions

What documentation is required for this diagnosis?

Documentation must include clinical symptoms, diagnostic test results, and treatment plans.

How does this differ from similar diagnoses?

Atherosclerosis heart disease specifically refers to chronic ischemic heart disease due to plaque buildup, unlike other heart conditions.

What are common billing considerations?

Ensure that the diagnosis is supported by clinical documentation to optimize reimbursement.

What procedures are typically associated?

Common procedures include stress tests, angiography, and interventions like stenting.

Are there any quality reporting implications?

Quality measures may include monitoring lipid levels and adherence to treatment guidelines.