2026 ICD-10-CM Diagnosis Code E13Other specified diabetes mellitus

ICD-10-CM Codes›E00–E89›E08-E13›E13

ICD-10-CM E13
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E13 is a non-billable ICD-10-CM category code for other specified diabetes mellitus, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E13.00, E13.01, E13.10, and E13.11.

Code Identity

ICD-10-CM Code
E13
Billable Status
No — Non-Billable Category
Code Describes
Other specified diabetes mellitus
Chapter
E08-E13
Diabetes mellitus

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE08-E13Diabetes mellitus
CategoryE13Other specified diabetes mellitus
This CodeE13Other specified diabetes mellitus

Specific Coding for Other specified diabetes mellitusOverview

Non-specific codes like E13 require more characters. Use one of these billable codes instead:

  • E13.0 for Other specified diabetes mellitus with hyperosmolarity

  • Use E13.00 for Other specified diabetes mellitus with hyperosmolarity without nonketotic hyperglycemic-hyperosmolar coma (NKHHC)

  • Use E13.01 for Other specified diabetes mellitus with hyperosmolarity with coma

  • E13.1 for Other specified diabetes mellitus with ketoacidosis

  • Use E13.10 for Other specified diabetes mellitus with ketoacidosis without coma

  • Use E13.11 for Other specified diabetes mellitus with ketoacidosis with coma

  • E13.2 for Other specified diabetes mellitus with kidney complications

  • Use E13.21 for Other specified diabetes mellitus with diabetic nephropathy

  • Use E13.22 for Other specified diabetes mellitus with diabetic chronic kidney disease

  • Use E13.29 for Other specified diabetes mellitus with other diabetic kidney complication

  • E13.3 for Other specified diabetes mellitus with ophthalmic complications

  • E13.31 for Other specified diabetes mellitus with unspecified diabetic retinopathy

  • E13.32 for Other specified diabetes mellitus with mild nonproliferative diabetic retinopathy

  • E13.33 for Other specified diabetes mellitus with moderate nonproliferative diabetic retinopathy

  • E13.34 for Other specified diabetes mellitus with severe nonproliferative diabetic retinopathy

  • E13.35 for Other specified diabetes mellitus with proliferative diabetic retinopathy

  • Use E13.36 for Other specified diabetes mellitus with diabetic cataract

  • E13.37 for Other specified diabetes mellitus with diabetic macular edema, resolved following treatment

  • Use E13.39 for Other specified diabetes mellitus with other diabetic ophthalmic complication

  • E13.4 for Other specified diabetes mellitus with neurological complications

  • Use E13.40 for Other specified diabetes mellitus with diabetic neuropathy, unspecified

  • Use E13.41 for Other specified diabetes mellitus with diabetic mononeuropathy

  • Use E13.42 for Other specified diabetes mellitus with diabetic polyneuropathy

  • Use E13.43 for Other specified diabetes mellitus with diabetic autonomic (poly)neuropathy

  • Use E13.44 for Other specified diabetes mellitus with diabetic amyotrophy

  • Use E13.49 for Other specified diabetes mellitus with other diabetic neurological complication

  • E13.5 for Other specified diabetes mellitus with circulatory complications

  • Use E13.51 for Other specified diabetes mellitus with diabetic peripheral angiopathy without gangrene

  • Use E13.52 for Other specified diabetes mellitus with diabetic peripheral angiopathy with gangrene

  • Use E13.59 for Other specified diabetes mellitus with other circulatory complications

  • E13.6 for Other specified diabetes mellitus with other specified complications

  • E13.61 for Other specified diabetes mellitus with diabetic arthropathy

  • E13.62 for Other specified diabetes mellitus with skin complications

  • E13.63 for Other specified diabetes mellitus with oral complications

  • E13.64 for Other specified diabetes mellitus with hypoglycemia

  • Use E13.65 for Other specified diabetes mellitus with hyperglycemia

  • Use E13.69 for Other specified diabetes mellitus with other specified complication

  • Use E13.8 for Other specified diabetes mellitus with unspecified complications

  • Use E13.9 for Other specified diabetes mellitus without complications

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.

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 genetic defects of beta-cell function
  • diabetes mellitus due to genetic defects in insulin action
  • postpancreatectomy diabetes mellitus
  • postprocedural diabetes mellitus
  • secondary diabetes mellitus NEC

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 autoimmune process E10
  • diabetes mellitus due to immune mediated pancreatic islet beta-cell destruction E10
  • diabetes mellitus due to underlying condition E08
  • drug or chemical induced diabetes mellitus E09
  • gestational diabetes O24.4
  • neonatal diabetes mellitus P70.2
  • type 1 diabetes mellitus E10

Patient EducationClinical

Diabetes

Diabetes, also known as diabetes mellitus, is a disease in which your blood glucose, or blood sugar, levels are too high. Glucose is your body's main source of energy. Your body can make glucose, but it also comes from the food you eat. Insulin is a hormone made by your pancreas.

The full article covers:

  • What is diabetes?
  • What are the types of diabetes?
  • What causes diabetes?
  • Who is more likely to develop diabetes?
  • What are the symptoms of diabetes?
  • How is diabetes diagnosed?
  • What are the treatments for diabetes?
  • Can 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 E13Overview

Is E13 (Other specified diabetes mellitus) a billable code?

No. This is a category header that groups the codes for other specified diabetes mellitus, and headers cannot be submitted on claims. Claims for other specified diabetes mellitus need a more specific code from this category, such as E13.00, E13.01, and E13.10.