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ICD-10 Guide
DiagnosesAddison'S Disease

Addison'S Disease

ICD-10 Coding for Addison's Disease(E27.1, E27.2)

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

Diagnosis Overview

What is Addison'S Disease?
Essential facts and insights about Addison's Disease

Key Clinical Considerations:

  • Symptoms of fatigue, weight loss, low blood pressure, and hyperpigmentation of the skin.
  • Laboratory findings may include low serum cortisol levels, elevated ACTH levels, and electrolyte imbalances such as hyponatremia and hyperkalemia.
  • Physical examination may reveal signs of dehydration, orthostatic hypotension, and skin changes.
  • Imaging studies are not typically required but may be used to assess adrenal gland size or structure in specific cases.
  • Severity criteria include the presence of adrenal crisis, which is characterized by severe hypotension, confusion, and shock.

Clinical Information

Clinical Criteria & Documentation Requirements

  • Document the patient's clinical history, including symptoms and duration.
  • Use specific terminology such as 'primary adrenal insufficiency' or 'secondary adrenal insufficiency' as applicable.
  • Examples include documenting lab results that confirm low cortisol and high ACTH levels.
  • Medical necessity must be established through documentation of symptoms and treatment plans.
  • Quality measures may include monitoring of cortisol levels and patient symptoms over time.

Coding Guidelines

Usage Guidelines & Examples

  • Use E27.1 for primary adrenal insufficiency (Addison's disease) and E27.2 for secondary adrenal insufficiency.
  • Do not use these codes for adrenal insufficiency due to acute illness or other non-chronic conditions.
  • Similar codes include E27.0 (adrenal crisis) and E27.9 (adrenal insufficiency, unspecified).
  • Common errors include misclassifying secondary adrenal insufficiency as primary; ensure correct documentation of the underlying cause.
  • In complex cases, consider the patient's history and any concurrent conditions that may affect adrenal function.

Code Exclusions

Important Exclusions

  • Excludes adrenal insufficiency due to acute illness or trauma.
  • Alternative codes for excluded conditions include E27.0 for adrenal crisis due to acute causes.
  • Conditions are excluded to ensure accurate representation of chronic adrenal insufficiency.
  • Common mistakes include coding Addison's disease when the patient has acute adrenal insufficiency.
  • Related but distinct conditions include Cushing's syndrome and congenital adrenal hyperplasia.

Related ICD-10 Codes

Primary Codes
E27.1
Primary adrenal insufficiency (Addison's disease)
E27.2
Secondary adrenal insufficiency
Ancillary Codes
E27.2
Differential Codes
E27.2
E27.2
for acute adrenal crisis episodes, characterized by severe symptoms like hypotension and hypoglycemia.

Related CPT Codes

CPT codes will be available in a future update.

Specialty Focus

Primary Specialty

Endocrinology

Specialty Applications

  • Applies to patients with chronic adrenal insufficiency, particularly those with autoimmune conditions.
  • Patient populations include adults and children, with a higher prevalence in women.
  • Clinical settings include endocrinology clinics, inpatient settings during adrenal crisis, and outpatient follow-ups.
  • Specialty-specific applications are primarily in endocrinology but may involve primary care for initial diagnosis.
  • Treatment contexts include hormone replacement therapy and management of adrenal crises.

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 Addison's disease based on clinical findings of fatigue and hyperpigmentation.'

Template 2

Template: 'Clinical presentation consistent with Addison's disease including low blood pressure and electrolyte imbalances.'

Template 3

Template: 'Diagnostic criteria for Addison's disease met as evidenced by low cortisol and elevated ACTH levels.'

Template 4

Template: 'Treatment plan initiated for Addison's disease with hydrocortisone replacement therapy.'

Template 5

Template: 'Follow-up care for Addison's disease including monitoring of cortisol levels and patient symptoms.'

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?

Detailed documentation of clinical symptoms, lab results, and treatment plans is required.

How does this differ from similar diagnoses?

Addison's disease is characterized by primary adrenal insufficiency, while secondary adrenal insufficiency is due to pituitary or hypothalamic dysfunction.

What are common billing considerations?

Ensure that documentation supports the medical necessity of tests and treatments related to adrenal insufficiency.

What procedures are typically associated?

Commonly associated procedures include ACTH stimulation tests and cortisol level assessments.

Are there any quality reporting implications?

Quality measures may include monitoring cortisol levels and patient symptom management over time.