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v1.0.0
ICD-10 Guide
DiagnosesAtrial Myxoma

Atrial Myxoma

ICD-10 Coding for Atrial Myxoma(D15.1)

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

Diagnosis Overview

What is Atrial Myxoma?
Essential facts and insights about Atrial Myxoma

Key Clinical Considerations:

  • Patients may present with symptoms such as dyspnea, palpitations, or syncope.
  • Echocardiography typically reveals a mass in the left atrium, often with a characteristic 'ball-valve' effect.
  • Physical examination may show signs of mitral valve obstruction or embolic phenomena.
  • Transesophageal echocardiography is often used for better visualization of the mass.
  • Severity is often assessed based on the size of the myxoma and the degree of obstruction it causes.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Medical records must include a detailed history of symptoms and physical examination findings.
  • Specific terminology such as 'left atrial mass' or 'myxoma' must be documented.
  • Examples include noting the size and location of the myxoma and any associated complications.
  • Documentation must demonstrate medical necessity for diagnostic tests and procedures performed.
  • Quality measures may include documentation of follow-up care and outcomes.

Coding Guidelines

Usage Guidelines & Examples

  • Use D15.1 for primary diagnosis of atrial myxoma when confirmed by imaging.
  • Do not use this code for other types of cardiac tumors or masses, such as sarcomas.
  • Compare with D15.0 (benign neoplasm of the heart) for other benign cardiac tumors.
  • Common errors include misclassifying myxomas as malignant or failing to document the location.
  • In complex cases, ensure that the specific type of myxoma and its effects on cardiac function are clearly documented.

Code Exclusions

Important Exclusions

  • Exclude codes for malignant cardiac tumors or other benign tumors not classified as myxomas.
  • Alternative codes for excluded conditions include those for cardiac sarcomas (C38.0).
  • Conditions are excluded based on histological classification and behavior of the tumor.
  • Common mistakes include coding myxomas as malignant or misidentifying the tumor type.
  • Related but distinct conditions include cardiac lipomas and fibromas.

Related ICD-10 Codes

Primary Codes
D15.1
Benign neoplasm of the heart, atrial myxoma
D15.0
Benign neoplasm of the heart, other
Ancillary Codes
I74.9
I50.9
Differential Codes
D21.9
D21.9
is used for soft tissue neoplasms not specified as cardiac.

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 confirmed atrial myxoma, typically in adults.
  • Patient populations may include middle-aged individuals, with a slight female predominance.
  • Clinical settings include both inpatient and outpatient cardiology practices.
  • Specialty-specific applications are primarily in cardiology and cardiac surgery.
  • Treatment contexts often involve surgical resection of the myxoma.

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 myxoma based on echocardiographic findings.'

Template 2

Template: 'Clinical presentation consistent with atrial myxoma including dyspnea and palpitations.'

Template 3

Template: 'Diagnostic criteria met as evidenced by transesophageal echocardiography showing a left atrial mass.'

Template 4

Template: 'Treatment plan initiated for atrial myxoma with surgical resection scheduled.'

Template 5

Template: 'Follow-up care for atrial myxoma including monitoring for recurrence and cardiac function.'

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 imaging results, clinical symptoms, and treatment plans.

How does this differ from similar diagnoses?

Atrial myxoma is a benign tumor, whereas other cardiac tumors may be malignant.

What are common billing considerations?

Ensure that all diagnostic tests and procedures are medically necessary and well-documented.

What procedures are typically associated?

Commonly associated procedures include echocardiography and surgical resection.

Are there any quality reporting implications?

Quality measures may include tracking outcomes post-surgery and follow-up care.