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v1.0.0
ICD-10 Guide
ICD-10 CodesE26.0

E26.0

Billable

Primary hyperaldosteronism

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

Code Description

ICD-10 E26.0 is a billable code used to indicate a diagnosis of primary hyperaldosteronism.

Key Diagnostic Point:

Primary hyperaldosteronism, also known as Conn's syndrome, is an endocrine disorder characterized by excessive production of the hormone aldosterone from the adrenal glands. This condition leads to an imbalance of electrolytes, particularly sodium and potassium, resulting in hypertension and potential cardiovascular complications. The adrenal glands, located atop each kidney, are responsible for producing various hormones, including aldosterone, which regulates sodium and potassium levels in the body. In primary hyperaldosteronism, the overproduction of aldosterone causes the kidneys to retain sodium and excrete potassium, leading to increased blood volume and elevated blood pressure. Patients may present with symptoms such as headaches, muscle weakness, fatigue, and palpitations. Diagnosis typically involves measuring plasma aldosterone levels, plasma renin activity, and conducting imaging studies to identify adrenal adenomas or hyperplasia. Treatment options include mineralocorticoid receptor antagonists, surgical removal of adrenal tumors, or lifestyle modifications to manage hypertension. Understanding the pathophysiology and clinical implications of primary hyperaldosteronism is crucial for effective management and coding.

Code Complexity Analysis

Complexity Rating: Medium

Medium Complexity

Complexity Factors

  • Differentiating between primary and secondary causes of hyperaldosteronism
  • Understanding the relationship between aldosterone and other hormones
  • Interpreting laboratory results accurately
  • Identifying associated conditions such as hypertension and hypokalemia

Audit Risk Factors

  • Inadequate documentation of laboratory results
  • Failure to specify the type of hyperaldosteronism
  • Misclassification of hypertension as essential rather than secondary
  • Lack of clear treatment plans in medical records

Specialty Focus

Medical Specialties

Endocrinology

Documentation Requirements

Detailed documentation of hormone levels, imaging studies, and treatment plans.

Common Clinical Scenarios

Patients presenting with resistant hypertension or unexplained hypokalemia.

Billing Considerations

Ensure all relevant lab results and imaging studies are included in the documentation.

Cardiology

Documentation Requirements

Documentation of cardiovascular assessments and management plans related to hypertension.

Common Clinical Scenarios

Patients with hypertension and arrhythmias potentially linked to electrolyte imbalances.

Billing Considerations

Document any cardiovascular complications that may arise from hyperaldosteronism.

Coding Guidelines

Inclusion Criteria

Use E26.0 When
  • Follow official ICD
  • CM coding guidelines, ensuring accurate documentation of the condition's etiology and associated symptoms
  • Include relevant lab results and imaging findings to support the diagnosis

Exclusion Criteria

Do NOT use E26.0 When
No specific exclusions found.

Related ICD-10 Codes

Related CPT Codes

84144CPT Code

Aldosterone level test

Clinical Scenario

Used to confirm diagnosis of primary hyperaldosteronism.

Documentation Requirements

Document the reason for the test and results.

Specialty Considerations

Endocrinologists should ensure comprehensive lab results are included.

ICD-10 Impact

Diagnostic & Documentation Impact

Enhanced Specificity

ICD-10 Improvements

The transition to ICD-10 has allowed for more specific coding of endocrine disorders, improving the accuracy of diagnoses and treatment tracking for conditions like primary hyperaldosteronism.

ICD-9 vs ICD-10

The transition to ICD-10 has allowed for more specific coding of endocrine disorders, improving the accuracy of diagnoses and treatment tracking for conditions like primary hyperaldosteronism.

Reimbursement & Billing Impact

reimbursement.

Resources

Clinical References

  • •
    American Association of Clinical Endocrinologists

Coding & Billing References

  • •
    American Association of Clinical Endocrinologists

Frequently Asked Questions

What are the common symptoms of primary hyperaldosteronism?

Common symptoms include hypertension, muscle weakness, fatigue, and palpitations due to electrolyte imbalances.

How is primary hyperaldosteronism diagnosed?

Diagnosis typically involves measuring plasma aldosterone levels, plasma renin activity, and imaging studies to identify adrenal abnormalities.