2026 ICD-10-CM Diagnosis Code E11.11Type 2 diabetes mellitus with ketoacidosis with coma

ICD-10-CM Codes›E00–E89›E08-E13›E11

ICD-10-CM E11.11
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E11.11 is a billable ICD-10-CM diagnosis code for type 2 diabetes mellitus with ketoacidosis with coma. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 637 through 639. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Coma; stupor; and brain damage; Diabetes mellitus with complication; and Diabetes mellitus, Type 2.

This medical diagnosis code is frequently used in Family Practice medical specialties to designate conditions such diabetes mellitus with complications type 2.

Code Identity

ICD-10-CM Code
E11.11
Billable Status
Yes — Valid for Submission
Code Describes
Type 2 diabetes mellitus with ketoacidosis with coma
Short Description
Type 2 diabetes mellitus with ketoacidosis with coma
Same as the full description in the CMS dataset.
Parent Code
E11.1
Type 2 diabetes mellitus with ketoacidosis

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE08-E13Diabetes mellitus
CategoryE11Type 2 diabetes mellitus
This CodeE11.11Type 2 diabetes mellitus with ketoacidosis with coma

Coding GuidelinesGuidance

The diabetes mellitus codes are combination codes that include the type of diabetes mellitus, the body system affected, and the complications affecting that body system. As many codes within a particular category as are necessary to describe all of the complications of the disease may be used. They should be sequenced based on the reason for a particular encounter. Assign as many codes from categories E08 - E13 as needed to identify all of the associated conditions that the patient has.

If the type of diabetes mellitus is not documented in the medical record the default is E11.-, Type 2 diabetes mellitus.

Source: ICD-10-CM Official Guidelines for Coding and Reporting, FY 2026, published by CMS and the National Center for Health Statistics.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Diabetes, diabetic(mellitus) (sugar)
      • with
        • coma due to
          • ketoacidosis
    • Diabetes, diabetic(mellitus) (sugar)
      • with
        • ketoacidosis
          • with coma
    • Diabetes, diabetic(mellitus) (sugar)
      • type 2
        • with
          • ketoacidosis
            • with coma

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR NVS013
Coma; stupor; and brain damage
Default principal diagnosis: inpatient No · outpatient No
CCSR END003
Diabetes mellitus with complication
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR END005
Diabetes mellitus, Type 2
Default principal diagnosis: inpatient No · outpatient No

Patient EducationClinical

Coma

A coma is a deep state of unconsciousness. An individual in a coma is alive but unable to move or respond to his or her environment. Coma may occur as a complication of an underlying illness, or as a result of injuries, such as brain injury.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Convert E11.11 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
250.30 DMII o cm nt st uncntrld
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement E11.11 replaces the following previously assigned code(s):

  • E11.69 - Type 2 diabetes mellitus with other specified complication
  • R40.20 - Unspecified coma
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E11.11Overview

Is E11.11 (Type 2 diabetes mellitus with ketoacidosis) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report type 2 diabetes mellitus with ketoacidosis with coma on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E11.11 group to?

When type 2 diabetes mellitus with ketoacidosis with coma is the principal diagnosis on an inpatient stay, it groups to MS-DRG 637, 638, 639, with relative weights from 0.6212 to 1.4367 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of E11.11?

Under the General Equivalence Mappings, type 2 diabetes mellitus with ketoacidosis with coma converts to ICD-9-CM 250.30 (DMII o cm nt st uncntrld). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.