2027 ICD-10-CM Diagnosis Code E10Type 1 diabetes mellitus

ICD-10-CM Codes›E00–E89›E08-E13›E10

ICD-10-CM E10
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

E10 is a non-billable ICD-10-CM category code for type 1 diabetes mellitus, so it cannot be submitted on claims. Use a more specific code from this category instead, such as E10.10, E10.11, E10.21, and E10.22.

Code Identity

ICD-10-CM Code
E10
Billable Status
No — Non-Billable Category
Code Describes
Type 1 diabetes mellitus
Short Description
Type 1 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
CategoryE10Type 1 diabetes mellitus
This CodeE10Type 1 diabetes mellitus

Specific Coding for Type 1 diabetes mellitusOverview

Non-specific codes like E10 require more characters. Use one of these billable codes instead:

  • E10.1 for Type 1 diabetes mellitus with ketoacidosis

  • Use E10.10 for Type 1 diabetes mellitus with ketoacidosis without coma

  • Use E10.11 for Type 1 diabetes mellitus with ketoacidosis with coma

  • E10.2 for Type 1 diabetes mellitus with kidney complications

  • Use E10.21 for Type 1 diabetes mellitus with diabetic nephropathy

  • Use E10.22 for Type 1 diabetes mellitus with diabetic chronic kidney disease

  • Use E10.29 for Type 1 diabetes mellitus with other diabetic kidney complication

  • E10.3 for Type 1 diabetes mellitus with ophthalmic complications

  • E10.31 for Type 1 diabetes mellitus with unspecified diabetic retinopathy

  • E10.32 for Type 1 diabetes mellitus with mild nonproliferative diabetic retinopathy

  • E10.33 for Type 1 diabetes mellitus with moderate nonproliferative diabetic retinopathy

  • E10.34 for Type 1 diabetes mellitus with severe nonproliferative diabetic retinopathy

  • E10.35 for Type 1 diabetes mellitus with proliferative diabetic retinopathy

  • Use E10.36 for Type 1 diabetes mellitus with diabetic cataract

  • E10.37 for Type 1 diabetes mellitus with diabetic macular edema, resolved following treatment

  • Use E10.39 for Type 1 diabetes mellitus with other diabetic ophthalmic complication

  • E10.4 for Type 1 diabetes mellitus with neurological complications

  • Use E10.40 for Type 1 diabetes mellitus with diabetic neuropathy, unspecified

  • Use E10.41 for Type 1 diabetes mellitus with diabetic mononeuropathy

  • Use E10.42 for Type 1 diabetes mellitus with diabetic polyneuropathy

  • Use E10.43 for Type 1 diabetes mellitus with diabetic autonomic (poly)neuropathy

  • Use E10.44 for Type 1 diabetes mellitus with diabetic amyotrophy

  • Use E10.49 for Type 1 diabetes mellitus with other diabetic neurological complication

  • E10.5 for Type 1 diabetes mellitus with circulatory complications

  • Use E10.51 for Type 1 diabetes mellitus with diabetic peripheral angiopathy without gangrene

  • Use E10.52 for Type 1 diabetes mellitus with diabetic peripheral angiopathy with gangrene

  • Use E10.59 for Type 1 diabetes mellitus with other circulatory complications

  • E10.6 for Type 1 diabetes mellitus with other specified complications

  • E10.61 for Type 1 diabetes mellitus with diabetic arthropathy

  • E10.62 for Type 1 diabetes mellitus with skin complications

  • E10.63 for Type 1 diabetes mellitus with oral complications

  • E10.64 for Type 1 diabetes mellitus with hypoglycemia

  • Use E10.65 for Type 1 diabetes mellitus with hyperglycemia

  • Use E10.69 for Type 1 diabetes mellitus with other specified complication

  • Use E10.8 for Type 1 diabetes mellitus with unspecified complications

  • Use E10.9 for Type 1 diabetes mellitus without complications

  • E10.A for Type 1 diabetes mellitus, presymptomatic

  • Use E10.A0 for Type 1 diabetes mellitus, presymptomatic, unspecified

  • Use E10.A1 for Type 1 diabetes mellitus, presymptomatic, Stage 1

  • Use E10.A2 for Type 1 diabetes mellitus, presymptomatic, Stage 2

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.

The age of a patient is not the sole determining factor, though most type 1 diabetics develop the condition before reaching puberty. For this reason type 1 diabetes mellitus is also referred to as juvenile diabetes.

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 E10: 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.

  • brittle diabetes (mellitus)
  • diabetes (mellitus) due to autoimmune process
  • diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction
  • idiopathic diabetes (mellitus)
  • juvenile onset diabetes (mellitus)
  • ketosis-prone diabetes (mellitus)

Excludes1

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

On E10 itself
  • diabetes mellitus due to underlying condition (E08.-)
  • drug or chemical induced diabetes mellitus (E09.-)
  • gestational diabetes (O24.4-)
  • hyperglycemia NOS (R73.9)
  • neonatal diabetes mellitus (P70.2)
  • postpancreatectomy diabetes mellitus (E13.-)
  • postprocedural diabetes mellitus (E13.-)
  • secondary diabetes mellitus NEC (E13.-)
  • type 2 diabetes mellitus (E11.-)
From Chapter 4 (E00-E89) Endocrine, nutritional and metabolic diseases applies to 973 codes
  • transitory endocrine and metabolic disorders specific to newborn (P70-P74)

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 E10, its category, or a range that includes it.

Excludes1 7

These codes carry an Excludes1 note naming E10: they are not reported together with it, unless the two conditions are unrelated.

  • E08 Diabetes mellitus due to underlying condition
    type 1 diabetes mellitus (E10.-)
  • E09 Drug or chemical induced diabetes mellitus
    type 1 diabetes mellitus (E10.-)
  • E11 Type 2 diabetes mellitus
    type 1 diabetes mellitus (E10.-)
  • E13 Other specified diabetes mellitus
    diabetes (mellitus) due to autoimmune process (E10.-)
  • E13 Other specified diabetes mellitus
    diabetes (mellitus) due to immune mediated pancreatic islet beta-cell destruction (E10.-)
  • E13 Other specified diabetes mellitus
    type 1 diabetes mellitus (E10.-)
  • Q45.3 Other congenital malformations of pancreas and pancreatic duct
    congenital diabetes mellitus (E10.-)

Use Additional Code 1

These codes say to use an additional code from the note, and E10 is one of the codes named.

  • O24.0 Pre-existing type 1 diabetes mellitus, in pregnancy, childbirth and the puerperium
    code from category E10 to further identify any manifestations

Clinical InformationClinical

  • Diabetes Mellitus, Type 1

    a subtype of diabetes mellitus that is characterized by insulin deficiency. it is manifested by the sudden onset of severe hyperglycemia, rapid progression to diabetic ketoacidosis, and death unless treated with insulin. the disease may occur at any age, but is most common in childhood or adolescence.

Patient EducationClinical

Diabetes Type 1

Diabetes means your blood glucose, also called blood sugar, is too high. With type 1 diabetes, your body makes little or no insulin. Insulin is a hormone from your pancreas that helps glucose move from your body into your cells, where it is used for energy. Your body can make glucose, but it also comes from the food you eat.

The full article covers:

  • What is type 1 diabetes?
  • What causes type 1 diabetes?
  • Who is more likely to develop type 1 diabetes?
  • What are the symptoms of type 1 diabetes?
  • How is type 1 diabetes diagnosed?
  • What are the treatments for type 1 diabetes?
  • Can type 1 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 E10Overview

What is the ICD-10 code for type 1 diabetes mellitus?

E10 is the ICD-10-CM category for type 1 diabetes mellitus, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

Is E10 (Type 1 diabetes mellitus) a billable code?

No. This is a category header that groups the codes for type 1 diabetes mellitus, and headers cannot be submitted on claims. Claims for type 1 diabetes mellitus need a more specific code from this category, such as E10.10, E10.11, and E10.21.

Can E10 be reported with a code from E08?

Not as a rule. The Excludes1 note on E10 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).