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ICD-10-CM 2027 diagnosis code

E11.1Type 2 diabetes mellitus with ketoacidosis

Not billable — use a more specific code

E11.1 is a header code, so it can't be reported by itself. Choose one of the 2 more specific codes beneath it.

Code last changed in FY2018 (effective October 1, 2017). Source: official FY2027 ICD-10-CM release from CDC/NCHS and CMS. Page updated September 29, 2026. About our data

About E11.1

E11.1 is the ICD-10-CM diagnosis code for type 2 diabetes mellitus with ketoacidosis. It belongs to category E11 (type 2 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 E11 (type 2 diabetes mellitus), E11.1 is specifically for type 2 diabetes mellitus with ketoacidosis. Related codes cover with hyperosmolarity (E11.0), with kidney complications (E11.2), with ophthalmic complications (E11.3), with neurological complications (E11.4), with circulatory complications (E11.5), with other specified complications (E11.6), with unspecified complications (E11.8), without complications (E11.9) and 1 more.

To report this condition, pick the subcode that matches the documentation: E11.10 (without coma) and E11.11 (with coma).

Use an additional code to identify control using: injectable non-insulin antidiabetic drugs (Z79.85), insulin (Z79.4), oral antidiabetic drugs (Z79.84) and oral hypoglycemic drugs (Z79.84).

It was added in FY2018, effective October 1, 2017.

Specific codes under E11.1

Notes that apply from higher levels

Instructions written at a parent level also apply to E11.1.

› From E11 Type 2 diabetes mellitus
Includes
  • diabetes (mellitus) due to insulin secretory defect
  • diabetes NOS
  • insulin resistant diabetes (mellitus)
Excludes1
  • diabetes mellitus due to underlying condition (E08.-)
  • drug or chemical induced diabetes mellitus (E09.-)
  • gestational diabetes (O24.4-)
  • neonatal diabetes mellitus (P70.2)
  • postpancreatectomy diabetes mellitus (E13.-)
  • postprocedural diabetes mellitus (E13.-)
  • secondary diabetes mellitus NEC (E13.-)
  • type 1 diabetes mellitus (E10.-)
Use additional code
  • code to identify control using:
  • injectable non-insulin antidiabetic drugs (Z79.85)
  • insulin (Z79.4)
  • oral antidiabetic drugs (Z79.84)
  • oral hypoglycemic drugs (Z79.84)

Broader instructions also apply from Chapter 4: Endocrine, nutritional and metabolic diseases.

Alphabetic index entries

1 entries

Terms in the official ICD-10-CM index that lead to E11.1.

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
  • FY2018 (effective 10/1/2017): Added
  • No changes since FY2018.

Common questions about E11.1

Is E11.1 billable?

No. E11.1 is a header code. Report one of its more specific subcodes instead.