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ICD-10-CM 2027 diagnosis code

E20Hypoparathyroidism

Not billable — use a more specific code

E20 is a header code, so it can't be reported by itself. Choose one of the 4 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 E20

E20 is the ICD-10-CM diagnosis code for hypoparathyroidism. It belongs to 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 4 subcodes must be used instead.

To report this condition, pick the subcode that matches the documentation: E20.0 (hypoparathyroidism), E20.1 (Pseudohypoparathyroidism), E20.8 (hypoparathyroidism) and E20.9 (unspecified).

Don't report E20 together with the conditions in its Excludes1 note: Di George's syndrome (D82.1), postprocedural hypoparathyroidism (E89.2), tetany NOS (R29.0) and transitory neonatal hypoparathyroidism (P71.4).

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 E20

Coding notes

Excludes1Not coded here — never report together with this code
  • Di George's syndrome (D82.1)
  • postprocedural hypoparathyroidism (E89.2)
  • tetany NOS (R29.0)
  • transitory neonatal hypoparathyroidism (P71.4)

Notes that apply from higher levels

Instructions written at a parent level also apply to E20.

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

Codes whose notes reference E20

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 E20

Is E20 billable?

No. E20 is a header code. Report one of its more specific subcodes instead.