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ICD-10-CM 2027 diagnosis code

E26.0Primary hyperaldosteronism

Not billable — use a more specific code

E26.0 is a header code, so it can't be reported by itself. Choose one of the 3 more specific codes beneath it.

Code unchanged since ICD-10-CM took effect on October 1, 2015. Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E26.0

E26.0 is the ICD-10-CM diagnosis code for primary hyperaldosteronism. It belongs to category E26 (hyperaldosteronism), block E20-E35 (disorders of other endocrine glands) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 3 subcodes must be used instead.

Within E26 (hyperaldosteronism), E26.0 is specifically for primary hyperaldosteronism. Related codes cover secondary hyperaldosteronism (E26.1), other hyperaldosteronism (E26.8) and unspecified (E26.9).

To report this condition, pick the subcode that matches the documentation: E26.01 (syndrome), E26.02 (aldosteronism) and E26.09 (hyperaldosteronism).

It has been part of ICD-10-CM since the code set took effect on October 1, 2015 and hasn't changed since.

Specific codes under E26.0

Notes that apply from higher levels

Instructions written at a parent level also apply to E26.0.

Broader instructions also apply from E20-E35 Disorders of other endocrine glands and Chapter 4: Endocrine, nutritional and metabolic diseases.

Code history

  1. 2016
  2. 2017
  3. 2018
  4. 2019
  5. 2020
  6. 2021
  7. 2022
  8. 2023
  9. 2024
  10. 2025
  11. 2026
  12. 2027
  • FY2016 (effective 10/1/2015): Added (first year of ICD-10-CM)
  • No changes since FY2016.

Common questions about E26.0

Is E26.0 billable?

No. E26.0 is a header code. Report one of its more specific subcodes instead.