2022 ICD-10-CM Diagnosis Code E26.01

Conn's syndrome

    2016 2017 2018 2019 2020 2021 2022 Billable/Specific Code
  • E26.01 is a billable/specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes.
  • The 2022 edition of ICD-10-CM E26.01 became effective on October 1, 2021.
  • This is the American ICD-10-CM version of E26.01 - other international versions of ICD-10 E26.01 may differ.
Code Also
Code Also Help
A code also note instructs that 2 codes may be required to fully describe a condition but the sequencing of the two codes is discretionary, depending on the severity of the conditions and the reason for the encounter.
  • adrenal adenoma (
    ICD-10-CM Diagnosis Code D35.0

    Benign neoplasm of adrenal gland

      2016 2017 2018 2019 2020 2021 2022 Non-Billable/Non-Specific Code
    D35.0-
    )
The following code(s) above E26.01 contain annotation back-references
Annotation Back-References
In this context, annotation back-references refer to codes that contain:
  • Applicable To annotations, or
  • Code Also annotations, or
  • Code First annotations, or
  • Excludes1 annotations, or
  • Excludes2 annotations, or
  • Includes annotations, or
  • Note annotations, or
  • Use Additional annotations
that may be applicable to E26.01:
  • E00-E89
    2022 ICD-10-CM Range E00-E89

    Endocrine, nutritional and metabolic diseases

    Note
    • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.
    Type 1 Excludes
    • transitory endocrine and metabolic disorders specific to newborn (P70-P74)
    Endocrine, nutritional and metabolic diseases
  • E20-E35
    2022 ICD-10-CM Range E20-E35

    Disorders of other endocrine glands

    Type 1 Excludes
    Disorders of other endocrine glands
Approximate Synonyms
  • Conn syndrome
  • Conns syndrome
Clinical Information
  • An endocrine disorder characterized by excessive production of aldosterone by the adrenal glands. Causes include adrenal gland adenoma and adrenal gland hyperplasia. The overproduction of aldosterone results in sodium and water retention and hypokalemia. Patients present with high blood pressure, muscle weakness, and headache.
  • Overproduction of aldosterone by an adrenal cortical adenoma, characterized typically by low potassium levels, underacidity of the body, muscular weakness, excess urination, excess thirst, and high blood pressure.
  • Primary hyperaldosteronism caused by the excess production of aldosterone by an adenoma of the zona glomerulosa or conn adenoma.
ICD-10-CM E26.01 is grouped within Diagnostic Related Group(s) (MS-DRG v39.0):
  • 643 Endocrine disorders with mcc
  • 644 Endocrine disorders with cc
  • 645 Endocrine disorders without cc/mcc

Convert E26.01 to ICD-9-CM

Code History
  • 2016 (effective 10/1/2015): New code (first year of non-draft ICD-10-CM)
  • 2017 (effective 10/1/2016): No change
  • 2018 (effective 10/1/2017): No change
  • 2019 (effective 10/1/2018): No change
  • 2020 (effective 10/1/2019): No change
  • 2021 (effective 10/1/2020): No change
  • 2022 (effective 10/1/2021): No change

Diagnosis Index entries containing back-references to E26.01:

ICD-10-CM Codes Adjacent To E26.01
E24.3 Ectopic ACTH syndrome
E24.4 Alcohol-induced pseudo-Cushing's syndrome
E24.8 Other Cushing's syndrome
E24.9 Cushing's syndrome, unspecified
E25 Adrenogenital disorders
E25.0 Congenital adrenogenital disorders associated with enzyme deficiency
E25.8 Other adrenogenital disorders
E25.9 Adrenogenital disorder, unspecified
E26 Hyperaldosteronism
E26.0 Primary hyperaldosteronism
E26.01 Conn's syndrome
E26.02 Glucocorticoid-remediable aldosteronism
E26.09 Other primary hyperaldosteronism
E26.1 Secondary hyperaldosteronism
E26.8 Other hyperaldosteronism
E26.81 Bartter's syndrome
E26.89 Other hyperaldosteronism
E26.9 Hyperaldosteronism, unspecified
E27 Other disorders of adrenal gland
E27.0 Other adrenocortical overactivity
E27.1 Primary adrenocortical insufficiency

Reimbursement claims with a date of service on or after October 1, 2015 require the use of ICD-10-CM codes.