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ICD-10 Guide
ICD-10 CodesE05.30

E05.30

Billable

Thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm

BILLABLE STATUSYes
IMPLEMENTATION DATEOctober 1, 2015
LAST UPDATED09/05/2025

Code Description

ICD-10 E05.30 is a billable code used to indicate a diagnosis of thyrotoxicosis from ectopic thyroid tissue without thyrotoxic crisis or storm.

Key Diagnostic Point:

Thyrotoxicosis from ectopic thyroid tissue refers to a condition where excess thyroid hormones are produced due to thyroid tissue located outside its normal anatomical location, typically in the neck or mediastinum. This condition can lead to symptoms of hyperthyroidism, such as weight loss, increased heart rate, anxiety, and heat intolerance. Unlike thyrotoxic crisis or storm, which is a severe and life-threatening exacerbation of hyperthyroidism, E05.30 indicates a more stable state of thyrotoxicosis. Diagnosis often involves thyroid function tests, including serum TSH, free T4, and total T3 levels, which typically show suppressed TSH and elevated thyroid hormones. Ectopic thyroid tissue can arise from developmental anomalies during embryogenesis, leading to the presence of functional thyroid tissue in atypical locations. Management may include monitoring, antithyroid medications, or surgical intervention depending on the severity of symptoms and the presence of complications.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between ectopic thyroid tissue and other causes of thyrotoxicosis.
  • Understanding the anatomical variations of ectopic thyroid tissue.
  • Interpreting thyroid function tests accurately.
  • Recognizing the absence of thyrotoxic crisis or storm.

Audit Risk Factors

  • Inadequate documentation of ectopic thyroid tissue.
  • Failure to specify the absence of thyrotoxic crisis.
  • Misinterpretation of thyroid function test results.
  • Lack of clarity in the clinical presentation.

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Thorough documentation of thyroid function tests, imaging studies, and clinical symptoms.

Common Clinical Scenarios

Patients presenting with unexplained hyperthyroid symptoms and abnormal thyroid function tests.

Billing Considerations

Ensure that the presence of ectopic thyroid tissue is documented and that the absence of crisis is clearly stated.

Surgery

Documentation Requirements

Detailed operative reports if surgical intervention is performed, including indications and findings.

Common Clinical Scenarios

Surgical evaluation of patients with suspected ectopic thyroid tissue causing compressive symptoms.

Billing Considerations

Document the surgical findings and any histopathological results to support the diagnosis.

Coding Guidelines

Inclusion Criteria

Use E05.30 When
  • Follow the official ICD
  • CM coding guidelines for accurate coding of thyrotoxicosis
  • Ensure that the diagnosis is supported by clinical documentation and that the absence of a thyrotoxic crisis is clearly indicated
  • Include relevant laboratory results and imaging studies in the documentation

Exclusion Criteria

Do NOT use E05.30 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

84443CPT Code

Thyroid function tests

Clinical Scenario

Used to evaluate thyroid hormone levels in patients suspected of having thyrotoxicosis.

Documentation Requirements

Document the rationale for testing and the results.

Specialty Considerations

Endocrinologists should ensure comprehensive lab results are included in the patient's record.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of conditions like thyrotoxicosis from ectopic thyroid tissue, improving the accuracy of data collection and reimbursement processes.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of conditions like thyrotoxicosis from ectopic thyroid tissue, improving the accuracy of data collection and reimbursement processes.

Reimbursement & Billing Impact

reimbursement processes.

Resources

Clinical References

  • •
    American Thyroid Association Guidelines

Coding & Billing References

  • •
    American Thyroid Association Guidelines

Frequently Asked Questions

What are the common symptoms of thyrotoxicosis from ectopic thyroid tissue?

Common symptoms include weight loss, increased heart rate, anxiety, heat intolerance, and tremors.

How is thyrotoxicosis from ectopic thyroid tissue diagnosed?

Diagnosis is made through thyroid function tests showing elevated T4 and suppressed TSH, along with imaging studies confirming ectopic thyroid tissue.