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v1.0.0
ICD-10 Guide
DiagnosesApixaban

Apixaban

ICD-10 Coding for Apixaban Therapy(I48.91, T45.515A, Z79.01)

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

Diagnosis Overview

What is Apixaban?
Essential facts and insights about Apixaban Therapy

Key Clinical Considerations:

  • Patients receiving Apixaban therapy may present with atrial fibrillation (AF) or venous thromboembolism (VTE) symptoms such as palpitations, shortness of breath, or leg swelling.
  • Laboratory findings may include elevated D-dimer levels in cases of suspected VTE, or echocardiogram results indicating AF.
  • Physical examination may reveal signs of thromboembolism, such as unilateral leg swelling or signs of stroke.
  • Imaging findings may include ultrasound results showing deep vein thrombosis (DVT) or CT scans indicating pulmonary embolism (PE).
  • Severity criteria may involve assessing the CHA2DS2-VASc score for AF patients or the Wells score for DVT/PE risk stratification.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must document the indication for Apixaban therapy, including specific diagnoses such as AF or VTE.
  • Terminology such as 'anticoagulation therapy', 'atrial fibrillation', and 'venous thromboembolism' must be clearly stated.
  • Examples include: 'Patient started on Apixaban for AF with a CHA2DS2-VASc score of 3.'
  • Documentation must demonstrate medical necessity, such as the risk of stroke in AF patients.
  • Quality measures may include documentation of patient education on bleeding risks and monitoring parameters.

Coding Guidelines

Usage Guidelines & Examples

  • Use I48.91 for unspecified atrial fibrillation when Apixaban is prescribed for stroke prevention.
  • Do NOT use T45.515A for patients without a documented adverse effect from Apixaban.
  • Compare with I48.0 for paroxysmal AF, which may have different management protocols.
  • Common errors include using the wrong code for the type of AF or failing to document the reason for therapy.
  • In complex cases, ensure to select codes that accurately reflect the patient's condition and treatment rationale.

Code Exclusions

Important Exclusions

  • Exclude codes for patients with contraindications to Apixaban, such as active bleeding disorders.
  • Alternative codes may include I48.0 for paroxysmal AF or I82 for other venous embolisms.
  • Conditions are excluded due to the risk of severe bleeding or lack of efficacy.
  • Common mistakes include misclassifying patients with contraindications as candidates for Apixaban therapy.
  • Related but distinct conditions include other anticoagulant therapies or non-thromboembolic arrhythmias.

Related ICD-10 Codes

Primary Codes
I48.91
Unspecified atrial fibrillation
T45.515A
Adverse effect of anticoagulants, initial encounter
Z79.01
Long term use of anticoagulants
Ancillary Codes
Z79.01
Differential Codes
I48.0
K92.2

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Cardiology

Specialty Applications

  • Apixaban is indicated for patients with atrial fibrillation, DVT, or PE.
  • Patient populations include adults, particularly those over 65 or with risk factors for thromboembolism.
  • Clinical settings include outpatient anticoagulation clinics and inpatient cardiology units.
  • Specialty-specific applications are relevant in cardiology and hematology.
  • Used in treatment contexts involving stroke prevention and management of thromboembolic events.

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 atrial fibrillation based on ECG findings and started on Apixaban.'

Template 2

Template: 'Clinical presentation consistent with DVT including unilateral leg swelling and pain.'

Template 3

Template: 'Diagnostic criteria for PE met as evidenced by CT angiography findings.'

Template 4

Template: 'Treatment plan initiated for atrial fibrillation with Apixaban and follow-up scheduled.'

Template 5

Template: 'Follow-up care for anticoagulation therapy including monitoring for bleeding risks.'

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 the diagnosis, indication for Apixaban, and any relevant clinical findings.

How does this differ from similar diagnoses?

Differentiation is based on the type of arrhythmia or thromboembolic event being treated.

What are common billing considerations?

Ensure accurate coding to reflect the diagnosis and treatment to optimize reimbursement.

What procedures are typically associated?

CPT codes for monitoring INR or other lab tests may be relevant.

Are there any quality reporting implications?

Quality measures may include adherence to anticoagulation protocols and patient education documentation.