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v1.0.0
ICD-10 Guide
DiagnosesApical Thrombus

Apical Thrombus

ICD-10 Coding for Apical Thrombus(I51.3)

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

Diagnosis Overview

What is Apical Thrombus?
Essential facts and insights about Apical Thrombus

Key Clinical Considerations:

  • Presence of an apical thrombus typically indicated by symptoms such as chest pain, dyspnea, or palpitations.
  • Echocardiography showing a mass in the apical region of the left ventricle.
  • Physical examination may reveal signs of heart failure or embolic phenomena.
  • Transesophageal echocardiography may provide clearer imaging of the thrombus.
  • Severity may be assessed based on the size of the thrombus and the degree of left ventricular dysfunction.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Complete medical history including risk factors such as atrial fibrillation or recent myocardial infarction.
  • Use of specific terminology such as 'apical thrombus' and 'left ventricular thrombus'.
  • Examples include documenting the size, location, and characteristics of the thrombus.
  • Medical necessity must be established through documentation of symptoms and diagnostic findings.
  • Quality measures may include documentation of anticoagulation therapy and follow-up imaging.

Coding Guidelines

Usage Guidelines & Examples

  • Use this diagnosis code when a thrombus is confirmed in the apical region of the heart, particularly in patients with a history of heart disease.
  • Do not use this code for thrombi located in other areas of the heart or for non-thrombotic conditions.
  • Similar codes include I51.2 (Other forms of heart disease) and I82.9 (Venous embolism and thrombosis, unspecified).
  • Common errors include misclassifying the thrombus location or failing to document the clinical context.
  • In complex cases, ensure that all contributing factors are documented to support the use of this code.

Code Exclusions

Important Exclusions

  • Conditions such as pulmonary embolism or deep vein thrombosis are excluded from this code.
  • Alternative codes for excluded conditions include I26 for pulmonary embolism.
  • Exclusions are based on the anatomical location of the thrombus and associated clinical implications.
  • Common mistakes include coding an apical thrombus when the thrombus is located elsewhere.
  • Related but distinct conditions include left ventricular aneurysm and cardiac tumors.

Related ICD-10 Codes

Primary Codes
I51.3
Apical thrombus
I51.2
Other forms of heart disease
Ancillary Codes
I48.X
Z79.01
Differential Codes
I24.0
I23.6

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • Apical thrombus applies to patients with a history of myocardial infarction or heart failure.
  • Patient populations include adults, particularly those over 65 or with cardiovascular risk factors.
  • Clinical settings include inpatient cardiology units and outpatient follow-up clinics.
  • Specialty-specific applications are relevant in cardiology and interventional cardiology.
  • Treatment contexts include anticoagulation therapy and potential surgical intervention.

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 apical thrombus based on echocardiographic findings.'

Template 2

Template: 'Clinical presentation consistent with apical thrombus including chest pain and dyspnea.'

Template 3

Template: 'Diagnostic criteria met as evidenced by echocardiogram showing a mass in the apical region.'

Template 4

Template: 'Treatment plan initiated for apical thrombus with anticoagulation therapy.'

Template 5

Template: 'Follow-up care for apical thrombus including monitoring of symptoms and imaging.'

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 findings, imaging results, and treatment plans.

How does this differ from similar diagnoses?

Key differences include the location of the thrombus and associated symptoms.

What are common billing considerations?

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

What procedures are typically associated?

CPT codes for echocardiography and anticoagulation management are commonly associated.

Are there any quality reporting implications?

Quality measures may include monitoring anticoagulation therapy and follow-up imaging.