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ICD10BillableValid for clinical use

ICD-10 Code E27.1: Primary adrenocortical insufficiency

E27.1 is a billable ICD-10 diagnosis code used to classify Primary adrenocortical insufficiency in medical records and claims. You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records. ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).

What is this code?

ICD-10 codes are diagnosis classification codes used in healthcare records, reporting, coding workflows, and billing support. This code sits within the broader ICD-10 area for Endocrine, nutritional and metabolic diseases (E00-E89).

When is it used?

  • May be used when a clinician documents primary adrenocortical insufficiency in a patient's medical record.
  • May appear in hospital records, claims, referrals, and clinical documentation.
  • This code can be used as a clinically usable diagnosis entry in standardized coding workflows.

What it does not mean

  • A code alone does not explain severity, treatment plan, or outcome.
  • A medical code should not be treated as a substitute for a doctor's diagnosis or advice.

Code hierarchy

chapter
4Endocrine, nutritional and metabolic diseases (E00-E89)
block
E20-E35Disorders of other endocrine glands
category
E27Other disorders of adrenal gland
currentE27

Official coding notes

Inclusion terms
  • Addison's disease
  • Autoimmune adrenalitis
Excludes1 (do not code together)
  • Addison only phenotype adrenoleukodystrophy (E71.528)
  • amyloidosis (E85.-)
  • tuberculous Addison's disease (A18.7)
  • Waterhouse-Friderichsen syndrome (A39.1)

Where you may see this code

You may see this code in hospital records, discharge summaries, insurance claims, encounter documentation, referrals, or other healthcare billing and coding records.

Related specialists

EndocrinologistGeneral Physician

Coding guidelines

Compatibility

Legacy and official ICD code match exactly.
Legacy codes
E27.1

Common synonyms

Primary adrenocortical insufficiency

Frequently asked questions

Code details

CodeE27.1
SystemICD10
Display namePrimary adrenocortical insufficiency
ChapterEndocrine, nutritional and metabolic diseases (E00-E89)
BlockDisorders of other endocrine glands

Flags

BillableYes
Valid clinical useYes

Source

SourceICD-10
Version2026-annual
Releaseannual
Year2026

Index terms

Matched terms
Addison'sAdrenalitis, adrenitisAtrophy, atrophic(of)Atrophy, atrophic(of)Deficiency, deficientDisease, diseasedHypoadrenalism, hypoadreniaHypoadrenocorticismHypofunctionInsufficiency, insufficientInsufficiency, insufficientInsufficiency, insufficient

About this content

This page is prepared by HealthAssure's clinical team using official coding standards from ICD-10. AI tools assist with drafting explanations, which are then reviewed and verified by healthcare professionals for accuracy. This content is for informational purposes and does not replace professional medical advice. Meet our team.