2026 ICD-10-CM Diagnosis Code E11Type 2 diabetes mellitus

ICD-10-CM Codes›E00–E89›E08-E13›E11

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

E11 is a non-billable ICD-10-CM category code for type 2 diabetes mellitus, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E11.00, E11.01, E11.10, and E11.11.

Code Identity

ICD-10-CM Code
E11
Billable Status
No — Non-Billable Category
Code Describes
Type 2 diabetes mellitus
Chapter
E08-E13
Diabetes mellitus

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE08-E13Diabetes mellitus
CategoryE11Type 2 diabetes mellitus
This CodeE11Type 2 diabetes mellitus

Specific Coding for Type 2 diabetes mellitusOverview

Non-specific codes like E11 require more characters. Use one of these billable codes instead:

  • E11.0 for Type 2 diabetes mellitus with hyperosmolarity

  • Use E11.00 for Type 2 diabetes mellitus with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC)

  • Use E11.01 for Type 2 diabetes mellitus with hyperosmolarity with coma

  • E11.1 for Type 2 diabetes mellitus with ketoacidosis

  • Use E11.10 for Type 2 diabetes mellitus with ketoacidosis without coma

  • Use E11.11 for Type 2 diabetes mellitus with ketoacidosis with coma

  • E11.2 for Type 2 diabetes mellitus with kidney complications

  • Use E11.21 for Type 2 diabetes mellitus with diabetic nephropathy

  • Use E11.22 for Type 2 diabetes mellitus with diabetic chronic kidney disease

  • Use E11.29 for Type 2 diabetes mellitus with other diabetic kidney complication

  • E11.3 for Type 2 diabetes mellitus with ophthalmic complications

  • E11.31 for Type 2 diabetes mellitus with unspecified diabetic retinopathy

  • E11.32 for Type 2 diabetes mellitus with mild nonproliferative diabetic retinopathy

  • E11.33 for Type 2 diabetes mellitus with moderate nonproliferative diabetic retinopathy

  • E11.34 for Type 2 diabetes mellitus with severe nonproliferative diabetic retinopathy

  • E11.35 for Type 2 diabetes mellitus with proliferative diabetic retinopathy

  • Use E11.36 for Type 2 diabetes mellitus with diabetic cataract

  • E11.37 for Type 2 diabetes mellitus with diabetic macular edema, resolved following treatment

  • Use E11.39 for Type 2 diabetes mellitus with other diabetic ophthalmic complication

  • E11.4 for Type 2 diabetes mellitus with neurological complications

  • Use E11.40 for Type 2 diabetes mellitus with diabetic neuropathy, unspecified

  • Use E11.41 for Type 2 diabetes mellitus with diabetic mononeuropathy

  • Use E11.42 for Type 2 diabetes mellitus with diabetic polyneuropathy

  • Use E11.43 for Type 2 diabetes mellitus with diabetic autonomic (poly)neuropathy

  • Use E11.44 for Type 2 diabetes mellitus with diabetic amyotrophy

  • Use E11.49 for Type 2 diabetes mellitus with other diabetic neurological complication

  • E11.5 for Type 2 diabetes mellitus with circulatory complications

  • Use E11.51 for Type 2 diabetes mellitus with diabetic peripheral angiopathy without gangrene

  • Use E11.52 for Type 2 diabetes mellitus with diabetic peripheral angiopathy with gangrene

  • Use E11.59 for Type 2 diabetes mellitus with other circulatory complications

  • E11.6 for Type 2 diabetes mellitus with other specified complications

  • E11.61 for Type 2 diabetes mellitus with diabetic arthropathy

  • E11.62 for Type 2 diabetes mellitus with skin complications

  • E11.63 for Type 2 diabetes mellitus with oral complications

  • E11.64 for Type 2 diabetes mellitus with hypoglycemia

  • Use E11.65 for Type 2 diabetes mellitus with hyperglycemia

  • Use E11.69 for Type 2 diabetes mellitus with other specified complication

  • Use E11.8 for Type 2 diabetes mellitus with unspecified complications

  • Use E11.9 for Type 2 diabetes mellitus without complications

  • Use E11.A for Type 2 diabetes mellitus without complications in remission

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.

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • diabetes (mellitus) due to insulin secretory defect
  • diabetes NOS
  • insulin resistant diabetes (mellitus)

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

Type 1 Excludes

  • 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

Patient EducationClinical

Diabetes Type 2

Type 2 diabetes is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose is your main source of energy. It comes from the foods you eat. A hormone called insulin helps the glucose get into your cells to give them energy. If you have diabetes, your body doesn't make enough insulin or doesn't use insulin well.

The full article covers:

  • What is type 2 diabetes?
  • What causes type 2 diabetes?
  • Who is at risk for type 2 diabetes?
  • What are the symptoms of type 2 diabetes?
  • How is type 2 diabetes diagnosed?
  • What are the treatments for type 2 diabetes?
  • Can type 2 diabetes be prevented?

Read the full article at MedlinePlus

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

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About E11Overview

Is E11 (Type 2 diabetes mellitus) a billable code?

No. This is a category header that groups the codes for type 2 diabetes mellitus, and headers cannot be submitted on claims. Claims for type 2 diabetes mellitus need a more specific code from this category, such as E11.00, E11.01, and E11.10.