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

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
Short Description
Other specified 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
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 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 E13: 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 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

Excludes1

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

On E13 itself
  • 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.-)
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 E13, its category, or a range that includes it.

Excludes1 13

These codes carry an Excludes1 note naming E13: they are not reported together with it, unless the two conditions are unrelated.

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

Excludes2 1

These codes carry an Excludes2 note naming E13: 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)

Code First 1

These codes say to code first a condition named in the note, and E13 is one of the conditions named.

  • E89.1 Postprocedural hypoinsulinemia
    if applicable, diabetes mellitus (postpancreatectomy) (postprocedural) (E13.-)

Use Additional Code 3

These codes say to use an additional code from the note, and E13 is one of the codes named.

  • O24.8 Other pre-existing diabetes mellitus in pregnancy, childbirth, and the puerperium
    from categories E08, E09 and E13 to further identify any manifestation
  • O24.9 Unspecified diabetes mellitus in pregnancy, childbirth and the puerperium
    from categories E08, E09 and E13 to further identify any manifestation
  • Z90.41 Acquired absence of pancreas
    diabetes mellitus, postpancreatectomy (E13.-)

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

Questions About E13Overview

What is the ICD-10 code for other specified diabetes mellitus?

E13 is the ICD-10-CM category for other specified diabetes mellitus, but it is a non-billable header: claims need a more specific code from this category, listed on this page.

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.

Can E13 be reported with a code from E10?

Not as a rule. The Excludes1 note on E13 lists "diabetes (mellitus) due to autoimmune process (E10.-)". 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 E13 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 E13.