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ICD-10-CM 2027 diagnosis code

E10.64Type 1 diabetes mellitus with hypoglycemia

Not billable — use a more specific code

E10.64 is a header code, so it can't be reported by itself. Choose one of the 2 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 E10.64

E10.64 is the ICD-10-CM diagnosis code for type 1 diabetes mellitus with hypoglycemia. It belongs to category E10 (type 1 diabetes mellitus), block E08-E13 (diabetes mellitus) and chapter 4 (endocrine, nutritional and metabolic diseases). It is a header code, so it can't be reported by itself; one of its 2 subcodes must be used instead.

Within E10.6 (type 1 diabetes mellitus with other specified complications), E10.64 is specifically for type 1 diabetes mellitus with hypoglycemia. Related codes cover diabetic arthropathy (E10.61), skin complications (E10.62), oral complications (E10.63), hyperglycemia (E10.65) and other specified complication (E10.69).

To report this condition, pick the subcode that matches the documentation: E10.641 (with coma) and E10.649 (without coma).

Use an additional code for hypoglycemia level, if applicable (E16.A-).

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 E10.64

Coding notes

Use additional codeAdd a secondary code to fully describe the condition
  • code for hypoglycemia level, if applicable (E16.A-)

Notes that apply from higher levels

Instructions written at a parent level also apply to E10.64.

› From E10 Type 1 diabetes mellitus
Includes
  • brittle diabetes (mellitus)
  • diabetes (mellitus) due to autoimmune process
  • diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction
  • idiopathic diabetes (mellitus)
  • juvenile onset diabetes (mellitus)
  • ketosis-prone diabetes (mellitus)
Excludes1
  • diabetes mellitus due to underlying condition (E08.-)
  • drug or chemical induced diabetes mellitus (E09.-)
  • gestational diabetes (O24.4-)
  • hyperglycemia NOS (R73.9)
  • neonatal diabetes mellitus (P70.2)
  • postpancreatectomy diabetes mellitus (E13.-)
  • postprocedural diabetes mellitus (E13.-)
  • secondary diabetes mellitus NEC (E13.-)
  • type 2 diabetes mellitus (E11.-)

Broader instructions also apply from 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 E10.64

Is E10.64 billable?

No. E10.64 is a header code. Report one of its more specific subcodes instead.