2027 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 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

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
Short Description
Type 2 diabetes mellitus
Same as the full description in the CMS dataset.
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 2027, published by CMS and the National Center for Health Statistics.

Instructional NotesGuidance

Instructions from the official ICD-10-CM Tabular List that apply to E11: its own notes plus those printed at Chapter 4. A note printed at a category, block or chapter applies to every code under it.

Includes

Further defines, or gives examples of, the content of the category.

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

Excludes1

Not coded here: the excluded code is never reported together with this one, unless the two conditions are unrelated.

On E11 itself
  • 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.-)
From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

Use Additional Code

Add a second code, after this one, to fully describe the condition.

  • 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)

Notes

General instructions on how these codes are used.

From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • All neoplasms, whether functionally active or not, are classified in Chapter 2. Appropriate codes in this chapter (i.e. E05.8, E07.0, E16-E31, E34.-) may be used as additional codes to indicate either functional activity by neoplasms and ectopic endocrine tissue or hyperfunction and hypofunction of endocrine glands associated with neoplasms and other conditions classified elsewhere.

Source: CMS ICD-10-CM Tabular List. How to read instructional notes.

Referenced in Other NotesGuidance

Instructional notes printed at other codes that name E11, its category, or a range that includes it.

Excludes1 4

These codes carry an Excludes1 note naming E11: they are not reported together with it, unless the two conditions are unrelated.

  • E08 Diabetes mellitus due to underlying condition
    type 2 diabetes mellitus (E11.-)
  • E09 Drug or chemical induced diabetes mellitus
    type 2 diabetes mellitus (E11.-)
  • E10 Type 1 diabetes mellitus
    type 2 diabetes mellitus (E11.-)
  • E87.2 Acidosis
    diabetic acidosis - see categories E08-E10, E11, E13 with ketoacidosis

Excludes2 1

These codes carry an Excludes2 note naming E11: its condition is not part of those codes, and both may be reported when the patient has both.

  • E87.0 Hyperosmolality and hypernatremia
    diabetes with hyperosmolarity (E08, E09, E11, E13 with final characters .00 or .01)

Use Additional Code 2

These codes say to use an additional code from the note, and E11 is one of the codes named.

  • O24.1 Pre-existing type 2 diabetes mellitus, in pregnancy, childbirth and the puerperium
    from category E11 to further identify any manifestations
  • O24.3 Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium
    from category E11 to further identify any manifestation

Clinical InformationClinical

  • Diabetes Mellitus, Type 2

    a subclass of diabetes mellitus that is not insulin-responsive or dependent (niddm). it is characterized initially by insulin resistance and hyperinsulinemia; and eventually by glucose intolerance; hyperglycemia; and overt diabetes. type ii diabetes mellitus is no longer considered a disease exclusively found in adults. patients seldom develop ketosis but often exhibit obesity.

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 2017–2026No changes
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About E11Overview

What is the ICD-10 code for type 2 diabetes mellitus?

E11 is the ICD-10-CM category for type 2 diabetes mellitus, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can E11 be reported with a code from E08?

Not as a rule. The Excludes1 note on E11 lists "diabetes mellitus due to underlying condition (E08.-)". An Excludes1 note means the excluded code is never reported together with this one; the only exception is when the two conditions are unrelated to each other (Official Guidelines, Section I.A.12.a).

Does E11 need an additional code?

When the condition applies, yes. The Use Additional Code note reads: 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). The additional code is reported after E11.