2026 ICD-10-CM Diagnosis Code E13.9Other specified diabetes mellitus without complications

ICD-10-CM Codes›E00–E89›E08-E13›E13

ICD-10-CM E13.9
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

E13.9 is a billable ICD-10-CM diagnosis code for other specified diabetes mellitus without complications. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) 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. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Diabetes mellitus without complication; and Diabetes mellitus, due to underlying condition, drug or chemical induced, or other specified type.

Code Identity

ICD-10-CM Code
E13.9
Billable Status
Yes — Valid for Submission
Code Describes
Other specified diabetes mellitus without complications
Short Description
Other specified diabetes mellitus without complications
Same as the full description in the CMS dataset.
Parent Code
E13
Other specified diabetes mellitus

Code Classification

ChapterE00–E89Endocrine, nutritional and metabolic diseases
SectionE08-E13Diabetes mellitus
CategoryE13Other specified diabetes mellitus
This CodeE13.9Other specified diabetes mellitus without complications

Code EditsBilling

Medicare Code Editor checks that affect claim validity for E13.9.

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.

Quality Payment Program MeasuresBilling

Medicare quality measures that can apply when E13.9 is part of the patient record.

Diabetes: Hemoglobin A1c (HbA1c) Poor Control (>9%)

High Priority: YES

Measure Type: Intermediateoutcome

Submission Methods: Claims, Electronic Health Record, Cms Web Interface, Registry

Description: Percentage of patients 18-75 years of age with diabetes who had hemoglobin A1c > 9.0% during the measurement period.

View Measure

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acquired partial lipodystrophy
  • Acrorenal field defect, ectodermal dysplasia, and lipoatrophic diabetes
  • Agenesis of cerebellum
  • Atypical diabetes mellitus
  • Congenital hypoplasia of pancreas
  • Diabetes mellitus associated with genetic syndrome
  • Diabetes mellitus associated with hormonal etiology
  • Diabetes mellitus associated with pancreatic disease
  • Diabetes mellitus associated with receptor abnormality
  • Diabetes mellitus caused by chemical
  • Diabetes mellitus caused by insulin receptor antibodies
  • Diabetes mellitus due to genetic defect in beta cell function
  • Diabetes mellitus due to genetic defect in insulin action
  • Diabetes mellitus due to structurally abnormal insulin
  • Houssay's syndrome
  • Intellectual disability, craniofacial dysmorphism, hypogonadism, diabetes mellitus syndrome
  • Lipodystrophy, partial, with Rieger anomaly, short stature, and insulinopenic diabetes mellitus
  • Malnutrition related diabetes mellitus
  • Maturity onset diabetes of the young, type 1
  • Maturity-onset diabetes of the young
  • Maturity-onset diabetes of the young, type 10
  • Maturity-onset diabetes of the young, type 11
  • Maturity-onset diabetes of the young, type 3
  • Maturity-onset diabetes of the young, type 4
  • Maturity-onset diabetes of the young, type 5
  • Maturity-onset diabetes of the young, type 6
  • Maturity-onset diabetes of the young, type 7
  • Maturity-onset diabetes of the young, type 8
  • Maturity-onset diabetes of the young, type 9
  • Mild intellectual disability
  • Muscular atrophy, ataxia, retinitis pigmentosa, and diabetes mellitus
  • Neonatal diabetes mellitus
  • Pancreatic hypoplasia, diabetes mellitus, congenital heart disease syndrome
  • Permanent neonatal diabetes mellitus
  • Permanent neonatal diabetes mellitus with cerebellar agenesis syndrome
  • Pre-existing diabetes mellitus in pregnancy
  • Pre-existing malnutrition-related diabetes mellitus
  • Pre-existing malnutrition-related diabetes mellitus in pregnancy
  • Primary microcephaly, mild intellectual disability, young-onset diabetes syndrome
  • Secondary diabetes mellitus
  • Secondary endocrine diabetes mellitus

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.

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Diabetes, diabetic(mellitus) (sugar)
      • hepatogenous
    • Diabetes, diabetic(mellitus) (sugar)
      • specified type NEC

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 END006
Diabetes mellitus, due to underlying condition, drug or chemical induced, or other specified type
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Permanent Neonatal Diabetes Mellitus

    hyperglycemia in the first month of life due to a genetically determined defect in the structure, secretion and/or function of insulin that does not resolve spontaneously.

  • Acquired Partial Lipodystrophy

    partial lipodystrophy, the cause of which is not present at birth. examples include lipodystrophy associated with human immunodeficiency virus (hiv) therapy, and barraquer-simons syndrome, associated with c3 nephritic factor.

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.

Convert E13.9 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
249.00 Sec DM wo cmp nt st uncn
Approximate The match is approximate rather than exact.
ICD-9-CM
250.00 DMII wo cmp nt st uncntr
Approximate The match is approximate rather than exact.

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 E13.9Overview

Is E13.9 (Other specified diabetes mellitus) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report other specified diabetes mellitus without complications on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does E13.9 group to?

When other specified diabetes mellitus without complications is the principal diagnosis on an inpatient stay, it groups to MS-DRG 637, 638, 639, with relative weights from 0.6212 to 1.4367 depending on complications. Higher weights mean higher Medicare reimbursement.

Does E13.9 justify an inpatient admission?

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

What is the ICD-9 equivalent of E13.9?

Under the General Equivalence Mappings, other specified diabetes mellitus without complications converts to ICD-9-CM 249.00 (sec DM wo cmp nt st uncn) and 250.00 (DMII wo cmp nt st uncntr). The mapping is approximate, so confirm the match fits the documentation.

Footnotes

[1] Chronic - a chronic condition code indicates a condition lasting 12 months or longer and its effect on the patient based on one or both of the following criteria:

  • The condition results in the need for ongoing intervention with medical products,treatment, services, and special equipment
  • The condition places limitations on self-care, independent living, and social interactions.