2027 ICD-10-CM Diagnosis Code E11.AType 2 diabetes mellitus without complications in remission

ICD-10-CM Codes›E00–E89›E08-E13›E11

ICD-10-CM E11.A
CMSSource: CMS FY 2027 ICD-10-CM dataset · Effective Oct 1, 2026 – Sep 30, 2027

E11.A is a billable ICD-10-CM diagnosis code for type 2 diabetes mellitus without complications in remission. It is valid on HIPAA claims for fiscal year 2027 (October 1, 2026 through September 30, 2027) and groups to MS-DRG 637 through 639. The code is flagged as a questionable admission, since it rarely justifies inpatient admission on its own. Coders also document this condition as diabetes mellitus in remission. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diabetes mellitus without complication; and Diabetes mellitus, Type 2.

Code Identity

ICD-10-CM Code
E11.A
Billable Status
Yes — Valid for Submission
Code Describes
Type 2 diabetes mellitus without complications in remission
Short Description
Type 2 diabetes mellitus without complications in remission
Same as the full description in the CMS dataset.
Parent Code
E11
Type 2 diabetes mellitus

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE08-E13Diabetes mellitus
CategoryE11Type 2 diabetes mellitus
This CodeE11.AType 2 diabetes mellitus without complications in remission

Code EditsBilling

Medicare Code Editor checks that affect claim validity for E11.A.

Questionable admission codes
Some diagnoses are not usually sufficient justification for admission to an acute care hospital. For example, if a patient is given code R030 for elevated blood pressure reading, without diagnosis of hypertension, then the patient would have a questionable admission, since elevated blood pressure reading is not normally sufficient justification for admission to a hospital. The following list contains diagnosis codes identified as questionable admission when used.

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Diabetes mellitus in remission
  • Type 2 diabetes mellitus 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.A: its own notes plus those printed at E11 and 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.

From E11 Type 2 diabetes mellitus applies to 87 codes
  • 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.A itself
  • type 2 diabetes mellitus, with complications (E11.0-E11.8)
  • type 2 diabetes mellitus, without complications not in remission (E11.9)
From E11 Type 2 diabetes mellitus applies to 87 codes
  • 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.

From E11 Type 2 diabetes mellitus applies to 87 codes
  • 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.A, its category, or a range that includes it.

Excludes1 5

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

  • E11.9 Type 2 diabetes mellitus without complications
    type 2 diabetes mellitus, without complications in remission (E11.A)
  • E08 Diabetes mellitus due to underlying condition
    type 2 diabetes mellitus (E11.-) names E11.-, which includes this code
  • E09 Drug or chemical induced diabetes mellitus
    type 2 diabetes mellitus (E11.-) names E11.-, which includes this code
  • E10 Type 1 diabetes mellitus
    type 2 diabetes mellitus (E11.-) names E11.-, which includes this code
  • E87.2 Acidosis
    diabetic acidosis - see categories E08-E10, E11, E13 with ketoacidosis names E11, which includes this code

Excludes2 1

These codes carry an Excludes2 note naming E11.A: 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) names E11, which includes this code

Use Additional Code 2

These codes say to use an additional code from the note, and E11.A 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 names E11, which includes this code
  • O24.3 Unspecified pre-existing diabetes mellitus in pregnancy, childbirth and the puerperium
    from category E11 to further identify any manifestation names E11, which includes this code

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR END002
Diabetes mellitus without complication
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR END005
Diabetes mellitus, Type 2
Default principal diagnosis: inpatient No · outpatient No

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 History & ChangesHistory

Replacement E11.A replaces the following previously assigned code(s):

  • E11.9 - Type 2 diabetes mellitus without complications
FY 2026AddedAdded to the ICD-10-CM code setEffective October 1, 2025.
FY 2027CurrentCurrent code set, no changesEffective October 1, 2026 through September 30, 2027.

Questions About E11.AOverview

What is the ICD-10 code for type 2 diabetes mellitus without complications in remission?

The ICD-10-CM code for type 2 diabetes mellitus without complications in remission is E11.A (sometimes written as E11A). It is billable on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

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

Yes. This is a billable ICD-10-CM code, specific enough to report type 2 diabetes mellitus without complications in remission on HIPAA-covered claims from October 1, 2026 through September 30, 2027.

What MS-DRG does E11.A group to?

When type 2 diabetes mellitus without complications in remission is the principal diagnosis on an inpatient stay, it groups to MS-DRG 638, 639, 637, with relative weights from 0.6375 to 1.4127 depending on complications. Higher weights mean higher Medicare reimbursement.

Does E11.A justify an inpatient admission?

Not on its own. The Medicare Code Editor lists this code as a questionable admission because type 2 diabetes mellitus without complications in remission is not usually sufficient justification for admission to an acute care hospital.

Can E11.A be reported with E11.9?

Not as a rule. The Excludes1 note on E11.A lists "type 2 diabetes mellitus, without complications not in remission (E11.9)". 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).